Malicious PDF — malware analysis report

Static analysis result for SHA-256 82905da71fdb05a4…

MALICIOUS

PDF

119.6 KB Created: 2021-07-13 17:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 09b5e8a59cbb2eba95c2be2581afd1d1 SHA-1: b205feb30751a30887123ee8dbaffb2e4725e08b SHA-256: 82905da71fdb05a451017521824830f7b8ba6982f56cd171587e8953ccaac212
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The document body is unreadable, but the presence of numerous external URIs and the nature of the heuristics strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9719

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/a0bc4204a91cf724d6434bd49e034f91/kepasodokizajamag.pdf In PDF document text
    • https://gites-les-bardots.com/userfiles/file/tilufazojemunuziram.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072d509e689d---tufuribaleli.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16086005418f6e---6303253489.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b8c37a4e2---39794666773.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d659ca6dd33---molenubeseni.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b889f823356---lisoniwuguj.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/73207981683.pdfIn PDF document text
    • http://beiks.info/public/file/90698249486.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/lakagino.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/2fa3986edd9ebb03051903b644369048/fasolotewebonuwu.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/75b77ab40de6da298dd0738bf95fc040/butarixatawuxavodojarir.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b68bfaa7f6---40814582326.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0df0f2b98dbd7ebaf8e5e0a94c9a5a4f/pikuwupixojugona.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e4fdf31c88b---xisiramuxesavaxasifumos.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/fawefijabamijoluk.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b63945415b1---vudekitekevagifa.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/94656833425.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/9m4u1ok1kio1v6ee5mdj81q7p5/kekojib.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb484cd6bd4---kowamiroxetixijukes.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210623203622.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e9430730d---jefipikumejinujeronotux.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/l8kth3reke7hkvcoao1ku28ojk/84931294821.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609e104411026---boweba.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/kelek.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/dcd4aa51c0b2248be3799098f814ce32/lujovujireri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=pathfinder+2e+chill+touchPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000154cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154CB 20160 bytes
SHA-256: 31151745532d00a8560fc7020e173e6313ed97f73d82470628ddfe8ae9760305
font_01_sfnt_off000189b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1CD 10624 bytes
SHA-256: 4294e2842be2f1baa6ca837c74f85f73d0990f9797c745d9e4c7a457b8870090
font_03_sfnt_off0001ba0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BA0B 16324 bytes
SHA-256: 0ca7f33d6eab45fac5b8aaa06550378dc2ad130fe9aa33f2c93ac02ca5970b46

Open this report in the interactive analyzer, or submit your own file for analysis.