Malicious PDF — malware analysis report

Static analysis result for SHA-256 302cb80e667df38f…

MALICIOUS

PDF

87.9 KB Created: 2021-07-28 04:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8deaf821b56d907898a7444d1dbc499e SHA-1: a0682015630e903ca767e4d07cf9dfc585ab19b6 SHA-256: 302cb80e667df38f68dc60108fd69737fd6eb1ae802f9e5663f5f6b0d9b72396
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute traffic or potentially host malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/67tkitggr4nm38p0f4ik3futo9/85683472218.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093a1f9a6712---54999237051.pdf
    • https://kodcomputers.ro/2664/uploads/rutepolazutitabisor.pdf
    • http://open.ua/uploads/ckeditor/files/51051921590.pdf
    • https://ckd-otto.com/contents//files/73910860359.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070325d62477---83533719893.pdf
    • https://robertbah.si/files/file/91787195818.pdf
    • http://biotledlight.com/userfiles/file///94845111924.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608624cd34479---waxekuzovu.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/87d4b1f5c5e63f1364f34a7ed7015dc1/29956910340.pdf
    • https://corghialberti.it/file/puvadoxobaxozat.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/3a5fd0e2039e776f0e2bee1e703604b5/15742611842.pdf
    • https://ludifrance.fr/userfiles/file/3868254134.pdf
    • https://aduanaldelvalle.com/userfiles/file/rarul.pdf
    • http://piqiso.ru/userfiles/file/wewilexalatotor.pdf
    • http://vytvarnyobchod.cz/UserFiles/File/19556478216.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/13b6e88e0229da83663dba16d9856f19/koreluseganotur.pdf
    • http://gorisum.net/fckeditor/upload_file/file/dagamikebeti.pdf
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/9321f632a596cff279d446f38bd18188/lofemeduwexikapexunow.pdf
    • http://coeb.eu/userfiles/files/beginugovagoridin.pdf
    • http://bigband-ulm.de/userfiles/files/94923085885.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/87ad459a9116dd6289aba8c139e871c1/70916126053.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607708e3bed62---xikorekimodu.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/bf123bedd57078ebab79b0b22c7fd85d/30189597768.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=free+fishing+boat+plans+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 16792 bytes
font_01_sfnt_off00010b93.bin
0f938b4df150476cd32809ca91f71cee5c29bd2b831f7d6686aecdab4d12500e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 10896 bytes
font_02_sfnt_off00012435.bin
a60e9bfbb35e4c2c74fdace764bf48ac7be7739f45856f25f79c497a970e81b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 17428 bytes