Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6db2af4e3fd595…

MALICIOUS

PDF

64.7 KB Created: 2021-04-05 08:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2e299f48872488a4d10c8247eb403ab4 SHA-1: 5ae518e37e0bbd992438f4a154a935bcdbf050a9 SHA-256: cc6db2af4e3fd595364ffd2de27e215e34cca8af83ed51d754e54cdb9cdbcf5e
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/123?utm_term=bactrack+c8+manual PDF link annotation
    • http://likedizar.medianewsonline.com/lunebux.pdfIn PDF document text
    • https://dovezoluwebib.weebly.com/uploads/1/3/4/0/134017866/9591753.pdfIn PDF document text
    • https://wawokosekipazas.weebly.com/uploads/1/3/1/4/131452886/de32d0c566a3a9e.pdfIn PDF document text
    • https://giwizakewat.weebly.com/uploads/1/3/1/8/131857916/lolijuke.pdfIn PDF document text
    • http://korezafegedim.22web.org/circus_circus_menu.pdfIn PDF document text
    • http://jaderulax.22web.org/applied_economics.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/ziwekeruzoxotewozegi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://furofazitogo.epizy.com/analytic_function_nptel.pdfIn PDF document text
    • http://bidajalej.onlinewebshop.net/10th_new_syllabus_maths_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c1c4e8-5c28-45e1-bece-fc609529d016/true_metrix_meter_user_manual.pdfIn PDF document text
    • http://gipenebome.epizy.com/company_profile_template_online_free.pdfIn PDF document text
    • http://tizivedimusos.epizy.com/zupifaju.pdfIn PDF document text
    • http://fariwugakek.rf.gd/american_accent_pronunciation.pdfIn PDF document text
    • http://ligekasuxube.onlinewebshop.net/bdd_framework_tutorial.pdfIn PDF document text
    • http://setebixasabevu.rf.gd/gmc_acadia_2015_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/linear_algebra_4th_edition_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872b1202-e56e-44d5-9947-621d7c67f5dc/how_much_is_a_roku_stick_at_walmart.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC397 5072 bytes
SHA-256: c3dff690fe40dff60e6c9c068834ec85aad8337326ef68b035f80225ac5b9235
font_01_sfnt_off0000d4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C5 9812 bytes
SHA-256: b708ac7fbe8ab9ad4d61766a9aa97f953d19613fd304167734b9d738b72f3941