Malicious PDF — malware analysis report

Static analysis result for SHA-256 8378d419549495f8…

MALICIOUS

PDF

76.4 KB Created: 2020-11-18 10:27:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 587545e953f576ed6f299bd67fd5e9fd SHA-1: a5f027765a8175d062f200046a9828639ace69ed SHA-256: 8378d419549495f8d41554867c60c1e7293cf2bbf398af37fbe36dc90e60d0a3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO spam campaign. It contains a large number of external links, including one pointing to 'traffine.ru', suggesting an attempt to redirect users to potentially harmful sites or for link farming. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely related to distributing further content or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=far+cry+3+cheat+codes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f89699510933.pdfIn PDF document text
    • https://mimoberojatef.weebly.com/uploads/1/3/4/3/134316463/3589455.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443608/normal_5fadfda04332c.pdfIn PDF document text
    • https://fobibopokigafo.weebly.com/uploads/1/3/4/7/134702456/dukixenego-jotivijiwe-lejesokipim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_5fa05b5624a60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_5fa866dd508b8.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/gezetega/black_pandora_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/bisuwiwogewefajadosaz.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/hebrew_alphabet_script.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/fowiwifuwunosavox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835b905f-b8ba-46fb-beaa-3617c9c46bc9/pefaxalalixokozopi.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/bulakapesuwozerafoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/snowboard_wall_mount_no_screws.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/free_blank_commercial_lease_agreement.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 8

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_off0000eda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA0 5216 bytes
SHA-256: f64b74382fe61733d986cf1263ae3f716e947cd54146f0b18f1e3f38125943c9
font_01_sfnt_off0000ff62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF62 11052 bytes
SHA-256: 54c2d7a90df471e4c64ef03c3032e4748b637421ebfc34fdb672c065b48dbd38

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