Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7ffc62cb5398d0…

MALICIOUS

PDF

85.0 KB Created: 2021-01-10 04:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: e5c416a271ad826993092aabebcdb75b SHA-1: 539d7ed5e5e688b7fff17b3114c2c8460956b5e0 SHA-256: 2b7ffc62cb5398d09e30492471b6541fd19edee83bd6b1a9f069ddfc3ae54f21
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic firings point to the document acting as a link farm, embedding numerous URLs that likely lead to phishing sites or malware downloads. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content, potentially for credential harvesting or further infection.

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://traffine.ru/aws?utm_term=yowhatsapp+8.+0+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f9ff11210557.pdfIn PDF document text
    • https://cdn.sqhk.co/vitozogog/0hahfsC/hair_salon_in_walmart_shopping_center.pdfIn PDF document text
    • https://site-1178773.mozfiles.com/files/1178773/16990987390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_5fb5d2f690a85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f889f3628483.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/QUifmha/super_one_more_jump_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461481/normal_5fde3ae13dabb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483338/normal_5fba0f5e8efe4.pdfIn PDF document text
    • https://site-1171784.mozfiles.com/files/1171784/best_poweramp_equalizer_settings_for_bass.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5fd225a0a18fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8839da20308.pdfIn PDF document text
    • https://site-1168486.mozfiles.com/files/1168486/28302852521.pdfIn PDF document text
    • https://site-1176039.mozfiles.com/files/1176039/kanto_field_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377115/normal_5fdaee6b1145c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/91225898546.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
    • 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_off0000f817.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF817 5360 bytes
SHA-256: 71d145340398b46c5c71d189ab99a43fe71b3b32b96ca0c23e4a6a3891b1a928
font_01_sfnt_off00010a67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 11020 bytes
SHA-256: d1a4e698dfceae181b89517419c1cca3395a3331006caac75a9cbff07e840a44
font_02_sfnt_off00013035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13035 16656 bytes
SHA-256: 387f91ab73dd3685bd686a537218a99aec609482d27bc59cdc26a1338acb3a5f

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