Malicious PDF — malware analysis report

Static analysis result for SHA-256 5752a064c59e4d42…

MALICIOUS

PDF

64.2 KB Created: 2020-11-19 22:04:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 65db532101a15dae6018509df71305ab SHA-1: 8f6e47b1c1b0a7ff962d7f4184c2faf3307160a2 SHA-256: 5752a064c59e4d42c1e2b596e77856446ff77af7eaffa29fc03ffb99e2c7934b
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 0.9998

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=why+study+government+and+politics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4461751/normal_5fa87ef4e4e1c.pdfIn PDF document text
    • https://suvenalopevoku.weebly.com/uploads/1/3/4/5/134510495/64dd829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407318/normal_5f98d2cf8f25b.pdfIn PDF document text
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/6592894.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/79c58012d3eef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_5f9623dac26d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_5f98fa57e34cb.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/2f107f89-72c6-4016-8917-16ae2b50eb4a/study_guide_for_texes_esl_154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/899c2229-307f-4b81-9851-4db292c88998/revubolaxuxokozezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897d5a1a-0025-46cc-952f-14607567dbbc/deep_throat_pornhub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc9d2ec6-0700-4c31-9a5f-3145c26b4cd5/the_real_mccoys_theme_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30b9ef2-7c3c-465f-9550-8474dde1f51a/molunokujinitijuja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d36a75-9a7c-4ffc-b8f5-2c7fffb0f96d/81729673271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a90e74-2bda-4467-9d8f-d5b6fe889093/suzexovaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65ba34db-43ed-42a4-b830-2c3c38788539/59090605595.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_off0000bdad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAD 5664 bytes
SHA-256: 931d8160d7633f1fe7fd67160dcc2eb02abb7d502d6adb67d14996e24df7f9cf
font_01_sfnt_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 10312 bytes
SHA-256: 70a8dd831b03db5136cb5bfbdf4012768635783095615e6622a040c1814a74d0

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