Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddde581f9593396…

MALICIOUS

PDF

65.7 KB Created: 2020-12-06 16:32:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b136b9ef9deb0ecfe5450e2d6768f150 SHA-1: 93a42a33e68c0a9c8113113af74cb22f7796fe35 SHA-256: cddde581f9593396cd6468c14b2af1c8da675934c089c23101acc20bcddc7b16
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://trafffi.ru/strik?utm_term=marta+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f8cf7f430a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483851/normal_5fbc7c2948a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5f931363ef3ab.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/duvijodetan.pdfIn PDF document text
    • https://fenatelelopowi.weebly.com/uploads/1/3/4/5/134510159/4437630.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/dixibesolu_dotalaluxuzefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_5fab81d071d05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_5fb29b7c03148.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/5fbf63953570fb44d1faa1b7/1606378390870/kowezikerorep.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf4627acac6192a85de25/1606284387322/10219994992.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0cc948139af037644bbed/t/5fc44831cb3e0f5771d8146f/1606699057825/my_favorite_food_is_pizza_and_pasta.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/jolosozasonifivitirowim.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_off0000c5c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C2 4984 bytes
SHA-256: d8e721494efe1fe324e9d2c63b597897e13e98d4bee92893fa2f2c311d8a0b6e
font_01_sfnt_off0000d6ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AC 10488 bytes
SHA-256: 6112ae238357589cc08c5db7af190b1c9585d6c68122ef2739a1e668cf4d4db0

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