Malicious PDF — malware analysis report

Static analysis result for SHA-256 a549a791dfaddb64…

MALICIOUS

PDF

83.8 KB Created: 2020-11-23 21:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 94901e7ad3d503f011888052107ccdfe SHA-1: df533349fba34fb914eab25f45be2da193bdcec0 SHA-256: a549a791dfaddb6459a77966dc37ffe7d6085999771d6c1028813b6ea971af42
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 0.9997

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://trafftec.ru/strik?utm_term=characters+in+of+mice+and+men PDF link annotation
    • https://valogasode.weebly.com/uploads/1/3/4/3/134320371/dekew.pdfIn PDF document text
    • https://xapotitiguwux.weebly.com/uploads/1/3/4/6/134668809/vufakuvirasawef_nesekot_pitepujovetem.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/6501710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387428/normal_5fbb2ef9f21a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_5fad4a5c40641.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/buganabowumujef/valikanukubi.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/seruwesejepuxiser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ad414db-ca5a-49d6-9566-721f682bc01e/cdm_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/mobitofizizenegugizuja.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/asia_map_countries_and_capitals.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/peposit.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/64510332160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0084483-1607-41b3-b8ea-1d1e4ad7f6a1/tvbox_image_file_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

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_off0000fd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 5040 bytes
SHA-256: b592627f347cfe9381601f8ecaf160e2d5f16dcde350b80a83c670b8e1188f6d
font_01_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 10992 bytes
SHA-256: 7e3aeb67803edf028e892fea495a44b98fb1bda93ebb7a255b8b6db9b662069d
font_02_sfnt_off000133d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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