Malicious PDF — malware analysis report

Static analysis result for SHA-256 1429be568a235845…

MALICIOUS

PDF

85.2 KB Created: 2020-11-20 14:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cb797c38b6d1644e29c00eca9b19d255 SHA-1: 601484615c09ca8ab6dd1dcc88fe29919bdd6bb3 SHA-256: 1429be568a235845cf333dddc12c91f0c986710115812295e4da927a030ca02e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/strik?utm_term=como+esta+formada+uma+molecula+disfu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5faa7c4928f13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5f9b112d8f03d.pdfIn PDF document text
    • https://revamimetanezoj.weebly.com/uploads/1/3/4/5/134597499/xavejisumolurebad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f8c1bfeae9fe.pdfIn PDF document text
    • https://lazekikobetilof.weebly.com/uploads/1/3/4/4/134443651/7633848.pdfIn PDF document text
    • https://nugekepujipa.weebly.com/uploads/1/3/4/3/134318644/c1790e62e9853d1.pdfIn PDF document text
    • https://pofaleronuk.weebly.com/uploads/1/3/4/7/134722597/giwufewesenedimos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376086/normal_5f8c469b9d7b1.pdfIn PDF document text
    • https://tenaxujapem.weebly.com/uploads/1/3/4/3/134341928/bulogutijumikarel.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/04d290e19c.pdfIn PDF document text
    • https://talowitutujuf.weebly.com/uploads/1/3/3/9/133999148/kuwoveg.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/zeworibuzoza/77036774565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f514dc5c-2147-4d09-b43a-365024eccf70/page_furniture_indesign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b92d2e-cc0d-471c-8ec3-8bd89d68dc56/a_visual_dictionary_of_filipino_architecture.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_off0000f1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E2 5072 bytes
SHA-256: d18ae6f8aee8ec546311c36cd57e1d1309daae7af15720805b5c524b7c385fbe
font_01_sfnt_off00010306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10306 15060 bytes
SHA-256: 1b71f6f525b5dffa1775a75e6ab07e52d9a75becbbfb160b81f07c360bda48bf
font_02_sfnt_off0001307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307E 16260 bytes
SHA-256: e00996dd9ce131681fce6b684dfc9331a46c85e805227d31172045bc2b306c67

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