Malicious PDF — malware analysis report

Static analysis result for SHA-256 27248f5137f21181…

MALICIOUS

PDF

75.9 KB Created: 2021-05-30 20:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d755efd9223777338b137355f4a1d8ba SHA-1: 4054ba49312dda05e8e3f5ff765977921800b2a5 SHA-256: 27248f5137f21181af07e40e6a00d03cc73ae6db9b499799929a98541fef30b3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or phishing attempt, with one notable URL being https://bologen.ru/123?utm_term=grundfos+booster+pumps+catalogue+pdf. No scripts were extracted, but the PDF structure itself is suspicious.

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://bologen.ru/123?utm_term=grundfos+booster+pumps+catalogue+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392668/normal_600dba5c9ae59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_6031c47110335.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498978/normal_5fda126b74d04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379732/normal_5fcdfb3f0cc94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388157/normal_5febeea960e2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501660/normal_602389bb36f80.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4450044/normal_60b30ad8329b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479904/normal_606ea6821133d.pdfIn PDF document text
    • https://lutibaviw.weebly.com/uploads/1/3/4/6/134669369/3542140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465907/normal_6023ed8614b0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414161/normal_6056c5cad5502.pdfIn PDF document text
    • https://lonoguvuxa.weebly.com/uploads/1/3/5/3/135320471/981c38a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_6026bffbca1c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377120/normal_603288c7b7bd0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0811b6-d182-44ec-8f9b-31500cae6aeb/65086469571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2433e9f0-fb93-4e23-a9b8-626f67e9bf73/70647140278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c61353b-bc5e-4a26-9e17-b4097f8b3adf/intellicharger_i4_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c25c8a0-5291-4da7-b974-069ff4e3a9c1/67276054847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b1df97-0db6-4ea2-8342-58ae3bf2ada4/air_force_1_shadow_pastel_green.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c14b3f89-10ec-4e61-80a4-8c6eeb5a4b08/the_heroes_of_olympus_collection_5_books_set_collection_by_rick_riordan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9e62bf-cedf-4a1f-86af-6717543a2703/disciplines_of_a_godly_man_chapter_1.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_off0000ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 5644 bytes
SHA-256: c824b966a3076058313258fc57fac3e75c80a48e4778be0621f5dbfb6e4ef24b
font_01_sfnt_off0000fd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD81 10816 bytes
SHA-256: 5bb04f2b1fa9872a131d4a053a0504d9577f1ebab2cd24f0826b2f90805917aa

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