Malicious PDF — malware analysis report

Static analysis result for SHA-256 399aae3cb1476d8d…

MALICIOUS

PDF

58.0 KB Created: 2020-12-18 16:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f036a1f052ccc8c3abff497d50b3740a SHA-1: 49ce85f0b25101df3355d56e0b0695926042746a SHA-256: 399aae3cb1476d8d7f354c14d313917ea4134c74266481a623b55f4a4da0d5eb
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 detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one prominent URL pointing to 'traffking.ru', suggesting a link farm or redirection to malicious content. The document body, though heavily obfuscated, appears to reference 'Pax romana brainpop worksheet answers', a common lure for educational or informational content to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=pax+romana+brainpop+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492900/normal_5fd9245039282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fdc8c344fe1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454425/normal_5fae28bac3fd4.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/fetazilu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501495/normal_5fb7119eebb8c.pdfIn PDF document text
    • https://rijadotijijani.weebly.com/uploads/1/3/4/4/134470018/napazotuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_5f985605af80a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482402/normal_5fc3763930c15.pdfIn PDF document text
    • https://lamononokavaf.weebly.com/uploads/1/3/4/8/134878444/lafuvewoxed.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/5fc518c716f6d44b07d9a43f/t/5fc775ed8f079636157bbef2/1606907376243/i_will_cross_the_bridge_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51acfc6b-e33a-434c-b1b0-3719b0f99449/24395577447.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1619768612547ed61873d/t/5fcfae06cd9a2056ff81d1b1/1607446023455/bunofot.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_off0000a75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA75C 5392 bytes
SHA-256: 12deece156ea31d2d70c381019faf4a668e7dadc961b700ff739dc4cf855f04b
font_01_sfnt_off0000b999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB999 9304 bytes
SHA-256: 4601467591fbec9a61b5a56029a594559137ddf501358ed465ed37e8838df90f

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