Malicious PDF — malware analysis report

Static analysis result for SHA-256 0985f5a2f78301f2…

MALICIOUS

PDF

77.4 KB Created: 2021-03-20 23:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3654226336eaf3bee5c0f3a117e214d3 SHA-1: 30a0df06c778771898643c57911b01eeca138f6c SHA-256: 0985f5a2f78301f2151b3a7a6e6f437395f1a723e36034eb31aefaa42483a850
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/aws?utm_term=white+tiger+marvel PDF link annotation
    • http://newyearshop.site/10634276112cd5zm.pdfIn PDF document text
    • https://lexapokugivida.weebly.com/uploads/1/3/1/8/131856754/xoveta.pdfIn PDF document text
    • http://klokisik.space/pebezebitomezj4ilz.pdfIn PDF document text
    • https://limejanokevipa.weebly.com/uploads/1/3/0/7/130739330/e9cf159c5e6db1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_601d214c22958.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403543/normal_5fe513a2bfd7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445128/normal_6035f745a71a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448718/normal_5fcd7608c911b.pdfIn PDF document text
    • http://vilopeg.xyz/vivunevaridifu97uav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://113c517c-d7b0-4b36-99d7-6722bcb7ef36.filesusr.com/ugd/8e66a5_54ec43578cea4dfe94fee87c30041af8.pdf?index=trueIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_0130a269ecb04000b925d3b224d02aa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/94443705291.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/check_in_check_out_sheet_high_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86752bf5-2023-4c41-b65f-97b83ce206df/secondary_drinking_water_standards_california.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_c5706440a050406eaee26610c28e9fba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/627bf50e-e285-4b06-8974-edd9526a63af/dulipikidiwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe78519-4b2c-4664-a383-3e187f16f7f2/76530684026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a43a05d-bf34-46d4-aedb-e4d547bc072e/tiwomefajeze.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_off0000f392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF392 4992 bytes
SHA-256: a1e5dab6997909d2573a08fb2ad3d85a997a2c8ae4ef843db1b86febca2983ee
font_01_sfnt_off00010476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10476 10644 bytes
SHA-256: bfe2a210e448eb14305afc794a1df341d5f5aeea112e11169e2eb37d2cc89f9d

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