Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4caa216d3923a8…

MALICIOUS

PDF

73.9 KB Created: 2020-12-01 14:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9c745bb64dadc3f3e306ac99c6f9d4fb SHA-1: 1c642cc5e5dcc3b5eaecf650d8db26fa7d5eba10 SHA-256: ed4caa216d3923a84f816e4e6f95f67f62dc8f7535c55cb6f8a0c6c8e9177b80
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or distribution mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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://traffset.ru/123?utm_term=salter+aquatronic+kitchen+scale+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5faa749a525c8.pdfIn PDF document text
    • https://zuvopejibi.weebly.com/uploads/1/3/4/0/134017525/mutojo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_5faad86e283db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466166/normal_5fa3b80d8cb43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5f961ac7c70c9.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/5fbf582361e25426e12fc2e3/1606375459736/vikatunurofawigujopugisu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd359a99037f6de3fed369/1606235546945/sibulegatutakikunegikir.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e627116eb00e3c4beed8/t/5fc1cb25a97599144e399f25/1606535975456/rock_band_2_songs_dlc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28a83ea4a794d564f921d/t/5fc612c63570fb44d1d2a488/1606816457009/71361991173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb7ba31-1c96-4656-9496-4e733ac35e85/87541651160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab91ac6-ffbd-4868-8d27-d5b42b2318fd/bootstrap_tutorial_for_beginners.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_off0000e1cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CB 5332 bytes
SHA-256: bcb47e183fd893f6703be88d5ad6c2ae397c15d7c59556c0fb30786e6d626600
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 11520 bytes
SHA-256: 48f704c80315b4a360d75454bf204861d1c3c5f5d2754e37b5634eeb472a1259

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