Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea4846339438ffb…

MALICIOUS

PDF

67.7 KB Created: 2020-12-06 18:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2152d12feac0b5f8045c9311b1f38056 SHA-1: 5c513d92bc63ac15c5f2f7037d9a11618ab0c117 SHA-256: bea4846339438ffb3df5b2bf9987e3a702475bc776cdbf2d65591c63eb26c3cf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/123?utm_term=about+face+4+alan+cooper PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388162/normal_5fb60bc924b6a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408599/normal_5f9c427ba081a.pdfIn PDF document text
    • https://tadinitalu.weebly.com/uploads/1/3/4/7/134744808/bazubowezipunaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_5f97c43a023bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f8c25818a0ac.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/5fc0e9eb3398ff75152e2002/t/5fc612d13c02f22b9ddc7f0f/1606816465681/2684757012.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9b46a0-d31d-4a6e-a55e-d0a308316abc/susudakiloxokixurulur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8068d1a0-b21e-4b60-b286-549506bfaec2/wokuwidenapunalitafek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/983a0bb5-1fd4-45f3-8bb6-11c1ea2f8fd3/fobekujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68061e04-e88a-48a0-9ba7-76219b4d1957/vivid_seats_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3a58995-f7f8-4e6f-8c35-e8721b9d97ab/69811444460.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc68468239b07229157faec/t/5fc8cfc1970db930d9c9b5c0/1606995906902/free_survival_fire_battleground_apkmonk.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_off0000cd0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0B 5048 bytes
SHA-256: 5ae58e1b031886120a3841b035898d8d693edc3b92b6b6a957796efb4300582e
font_01_sfnt_off0000de51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE51 10536 bytes
SHA-256: dd23f9e0719c86d6859d5fbb7a2d86fdaeed01d7733a86af296bc1f4432bd00b

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