Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25c7e6a11e74c48…

MALICIOUS

PDF

73.6 KB Created: 2020-11-11 02:42:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 61f7b48ad841c78c2e1d9fc748729a27 SHA-1: e638f9b8bc651937c97c1aa22f725a20752cf906 SHA-256: d25c7e6a11e74c480dea6535c2fbd96811af3b30cfaf97694a1185cb15d822cc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, with one pointing to 'traffking.ru', suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to distribute malware or facilitate phishing campaigns.

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?keyword=gunner+johnson+bailey+sr+warm+springs+oregon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f8926e85627a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_5f9a92b57ff91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420602/normal_5f9bbf6db3f08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_5fa7698f63495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5f9ff00a4e3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5f900620d330c.pdfIn PDF document text
    • https://matubupediguja.weebly.com/uploads/1/3/4/1/134131452/kilaletukixunid.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/varoximu/external_cpu_cooler_for_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bf7a82a-f0c0-4ec2-a1e8-713da502832f/gemimerosozat.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/64593227853.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/holistic_marketing_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/72829839284.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/zijixurawunijutodewiza.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/general_anaesthetic_drugs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaa5af27-c6d0-4ddc-bcac-90dc64394018/rolumitizujodexa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA26 5676 bytes
SHA-256: 7588f79900643bc11c8e24757cdd31b5dae9a4b4186a7558862009223bf406b4
font_01_sfnt_off0000dd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD63 11980 bytes
SHA-256: 5e83f679165d44bacf73a5b753d091b7816a63fbc9a577e45f49d6bb8ae13951
font_02_sfnt_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 16060 bytes
SHA-256: 5b45d8957cdd618c0f157c507058aef1810e6158bb3d1abf257796d6008f54d1

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