Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb80c60f5064fb57…

MALICIOUS

PDF

86.1 KB Created: 2021-09-17 21:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3a0e61fd5157516b69b64258c371f1da SHA-1: 6402f008db510f26e0cf427d4da974634ccd8c8e SHA-256: bb80c60f5064fb57b96538a78e84253c8bc92155a56432fae15953c28c97d67c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to external resources, many of which are hosted on potentially compromised or disposable domains. The presence of these links suggests an intent to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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 http://hb1004.com/userData/board/file/tilexobunanegafosegam.pdf In PDF document text
    • http://ahkjt.com/upfile/file/zutuvakikemebomapipiju.pdfIn PDF document text
    • https://atlantidegattico.it/file/65950952789.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/70296617626.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210910110534.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/32505829719.pdfIn PDF document text
    • http://anpharma.net/upload/files/65708462459.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/tilujadevogetelaloxivob.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/96493921559.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/je3efi89gm9a1qjrfrl81dse4r/wugamijenaxa.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/33834588746.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/ee3a1f3389214317d376244e64377255/jupamidagaledoj.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16144033a09029---gevumusanizaputisefotogov.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/96489248768.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/75730171088.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202109file/2021091209081070554.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/molukazedekotimuzuluzamu.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/abb4f49f1f1e8f03bab50d17129af054/72444451307.pdfIn PDF document text
    • http://celcg.pl/uploaded/file/3323126580.pdfIn PDF document text
    • http://keralastatetailorsassociation.com/userfiles/file/lamamuvejitusikop.pdfIn PDF document text
    • http://torgoborud.org/images/file/75964999377.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/42622799286.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/75707271093.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/bepefivifutifaxagok.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/ditekidi.pdfIn PDF document text
    • https://brihat-group.com/assets/userfiles/files/givogidigadov.pdfIn PDF document text
    • http://labradory.pl/file/xujedewewew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=popular+movie+streaming+sitesPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB52 17772 bytes
SHA-256: 404fe66dd189f439ed4c1aa2d1443f21e916ff5c0f3a67580f97add36832f941
font_01_sfnt_off000119a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BE 10760 bytes
SHA-256: 58e0ec14e27e4d69bf856a250597325d8aef75ff0f67a296a19032fa87296d26

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