Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e7053b9e84fedbc…

MALICIOUS

PDF

76.6 KB Created: 2021-01-05 05:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 43db1ea45edf1e082654340580f2e6c8 SHA-1: 7c6ef1d58e28d20dddd104258cffad1d3708f730 SHA-256: 1e7053b9e84fedbc6d0db5e5a3fb56085dbb0cac38387a74270d1af8b31ea398
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'traffine.ru'. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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/aws?utm_term=mathematics+past+papers+grade+12+pdf In PDF document text
    • https://jujapuboma.weebly.com/uploads/1/3/4/6/134688254/622a91d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5f8da0f65ac73.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/9852171.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/vebogotexaf/96599339745.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/madexinesakan.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/tamisemevid.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/bully_scholarship_edition_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/chelsea_3_vs_arsenal_2_highlights.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/25762435354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45d5ed1-5d18-433b-b6d2-d5358445da8b/90531336458.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA9 5728 bytes
SHA-256: f54c2e997994a1028ac161318fbbbfc3d4cd2f0dda5bf9c27056363e4a2f90ae
font_01_sfnt_off00010213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 10564 bytes
SHA-256: e9a56070c9f13b5f07a1f8814c0e5da4da3d07cf393f972b1592b1f232596eed

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