Malicious PDF — malware analysis report

Static analysis result for SHA-256 7125e5247624a498…

MALICIOUS

PDF

66.1 KB Created: 2020-11-18 06:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 85e37a5de292df1122a35c2e536c416c SHA-1: c3a3b08266b0f23e2f6997162ada454bc96bfc61 SHA-256: 7125e5247624a498ca02aea28609cf5200d16efbbe82e8a10bfc86804db7a471
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous external links, with one pointing to 'https://traffking.ru/123?utm_term=helping+verb+powerpoint', suggesting a phishing or malware distribution attempt. The PDF also contains a large number of external links, indicating a potential link farm or SEO abuse tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=helping+verb+powerpoint PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375887/normal_5f9caeede000a.pdfIn PDF document text
    • https://jurexufibemoso.weebly.com/uploads/1/3/4/3/134310147/fegupovixuwix.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/xarojapi/2010122743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4dd3228-d8a7-4103-b17b-65b32471f699/wuwawuvife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20f4443-4cb7-4595-865c-cfb1a6db95a2/exercice_de_math_6eme_probleme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5ae878-1971-4892-a941-d7be5471c42e/lyman_shotshell_reloading_handbook_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a408f8c1-9b5a-4203-82d8-1e8beb787970/wuneferaronaxipevus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a8b437-34f7-428c-a7bb-41f9d1927d2b/90824077358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2363706d-6469-48fe-9d82-14f25f22f11c/red_by_kiss_blow_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/pdf_markup_software_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3985692-b12e-4a9b-abc9-3357fb8f593b/fojoz.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/detalan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02b52e1c-bd94-47eb-9d25-59cec80980bd/amine_caroline_download.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_off0000c7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 4852 bytes
SHA-256: 758409fbc0347d15b745f615b0310012211c1fac1c7862f6fc5b8f900c357a8e
font_01_sfnt_off0000d85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85F 10316 bytes
SHA-256: 1f09d9d07db8cfc0df726985ac3eeb976782e63b0e8470aa91f8ae42f78498a9

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