Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc562c17705d8f0…

MALICIOUS

PDF

78.5 KB Created: 2020-11-14 01:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 729d0563370db9845748a421effe17e3 SHA-1: 91658c324341758eb6db29f3ddedd4c8b5780e20 SHA-256: 2bc562c17705d8f03a9f7e9533129e51bba72435c37bb364bcd1173989137258
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest the document is part of a link farm, embedding numerous external URLs, with one specifically pointing to 'traffine.ru'. While no scripts were extracted, the presence of many external links, some with unknown reputations, suggests a potential phishing or malware distribution vector, possibly leveraging SEO tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://traffine.ru/123?utm_term=inotia+4+mod+apk+100+drop+rate PDF link annotation
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/negasezufit.pdfIn PDF document text
    • https://gotabidulubawob.weebly.com/uploads/1/3/4/7/134723529/7141ddec91.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/4385049.pdfIn PDF document text
    • https://lebidupevi.weebly.com/uploads/1/3/4/3/134319251/194477.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/megulu/shuters_premier_mathematics_grade_6_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f4f184-9b9d-4a32-9f86-a1d1ffc543ca/gamejekikulawukodijot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1acfbfe-60bd-4d61-a3d0-10832f55cdc1/54320610293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1d95c0a-a220-4c09-ae31-388843c0d7ad/vhf_marine_frequencies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/009cb2d1-a8d7-4462-9692-688ecf0bb101/52736329703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/771e2a20-b441-4aeb-a6b6-5886387a6465/15384723446.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD305 4124 bytes
SHA-256: 8057e5192fae043f1e543865795556d6e37da989802c80b5379f74cc2d1daf0c
font_01_sfnt_off0000e185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE185 5176 bytes
SHA-256: c4f636adec7148aa084dd1df2f62177c7b3dfa8c45641c40be044f13ca574e15
font_02_sfnt_off0000f318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF318 10584 bytes
SHA-256: 6ae4bed8112df86f4a9f1da04b8674707b24a5842777820f13b85dc8ee1f2bb2
font_03_sfnt_off00011778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11778 16084 bytes
SHA-256: a9541a3537930757e58d5369bc97e1066f8d34fb3873861f9f6dcba35f4d10e7

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