Malicious PDF — malware analysis report

Static analysis result for SHA-256 310212c8c3a03a4a…

MALICIOUS

PDF

71.3 KB Created: 2020-12-02 18:35:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 57386df74fe8c497c5a8f13306c3545b SHA-1: f482b9ba7ebc814f82c075fc35315142532609bd SHA-256: 310212c8c3a03a4ada00db955149483ac3b3952436030a7e2b09f1f12b8741d8
156 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 0.9998

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 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.
  • 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://trafffi.ru/strik?utm_term=metrica+y+rima+del+himno+nacional+argentino PDF link annotation
    • https://zebazowis.weebly.com/uploads/1/3/4/3/134310266/6164976.pdfIn PDF document text
    • https://jikisotawojagug.weebly.com/uploads/1/3/4/3/134393354/pumonetanufure_tunelen_fosavo_putazexex.pdfIn PDF document text
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/2028105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455659/normal_5fa2e85fcb8f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_5fb486d6bfb81.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/4514735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411937/normal_5fa6b9c8c0434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf557de18c5c478ef2e68c/1606374782030/bird_rock_yoga_outdoor.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e1448ef7301f8b1097bc/t/5fc2ff65f8cdb769c6464124/1606614886312/temple_of_minerva_wedding.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5be7c27a199023ad675ed/t/5fc72e588f07963615756d11/1606889054073/77021465148.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f22ee5c7695ca99bddc9/t/5fc1507c3c6ccf69f38eeb78/1606504574726/2k_wwe_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a43f2831-9a45-4d20-b0b8-ecc42da089db/unit_1_introduction_to_chemistry_test_review_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5a383485235c86bda9f9/1606375992957/21334762180.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 5280 bytes
SHA-256: 26d9670ef89cc2bc5ca7a002672cbebe7097865ac0739ad6c068dd52e150cf63
font_01_sfnt_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 11176 bytes
SHA-256: 25ca9cfb2a9f247a81e67835bbbd8a4c776960853ce36bf26f06a09e6d2a461e

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