Malicious PDF — malware analysis report

Static analysis result for SHA-256 3386c2da7fb356db…

MALICIOUS

PDF

85.4 KB Created: 2021-10-29 13:04:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 06051983db788da5fdaddae5c19d7486 SHA-1: 6b19d9e8068c5c40e07a4da5971ba3211b18521a SHA-256: 3386c2da7fb356db9c1c20de5875674884eb2e22e2c07627db224693835a9a15
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised or disposable hosting, suggesting it's designed to lead users to malicious sites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a tactic of using link farms on potentially untrusted infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smingames.com/ckfinder/files/woxumavilasojeje.pdf In PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/82799357514.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20211029081039.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/mekexepatufop.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1615aab3e5551d---bimotewodewowafidiga.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/gobuno.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16172a0095982f---61007530464.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/tewolavam.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/20222049407.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/69523203038.pdfIn PDF document text
    • https://xn--q3cceuw0c6ab0d2ii.com/upload_file/files/xujaratutagijone.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/rebawogotapopigugixokan.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/lerusesiminusitawokam.pdfIn PDF document text
    • http://getvisa.ru/images/File/zipumilodare.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/nejazinogoni.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/rewukupofosubesonotidu.pdfIn PDF document text
    • http://vita24h.com/uploads/userfiles/file/zegubilagezif.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/liwadil.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/38815544760.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/39318233174.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///rokokutawemon.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/44495970984.pdfIn PDF document text
    • https://metrosecuritynepal.com/assets/userfiles/files/fufurovotida.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/kkp57vg7c5c886incd0ad54rp2/3668885510.pdfIn PDF document text
    • https://bczenekar.uleshuzataruhaz.hu/files/file/59772057744.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/59b7fa71b2cf372271c180fb28413a3d/duzifelu.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/towixujajid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/EqozwcbAC44/uplcv?utm_term=99+in+frenchPDF 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_off0000e46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46D 9912 bytes
SHA-256: 06029dbddffd974cbea13fabc6636b85513ac4b459f26f71dea77f83104ea77a
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 20436 bytes
SHA-256: e542740e507820d1ea502ca6837a16f2e0d7a87e2cc9cf712e59faac55d78b45
font_02_sfnt_off00012fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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