Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74dcf4479ffcdfe…

MALICIOUS

PDF

74.2 KB Created: 2020-11-09 20:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3ac872c0f1886e7a06a4c7159c307523 SHA-1: 3674289f0737b27fa508cbbf5d5caf25b3b07e40 SHA-256: e74dcf4479ffcdfe87fa24da08d754b7667066c83c456d061e03120e2a249ca0
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of embedded external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. The primary URL points to a domain associated with keyword stuffing, suggesting a malicious intent to manipulate search results or redirect users to potentially harmful sites. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://traffset.ru/aws?keyword=the+pampered+chef+manual+food+processor PDF link annotation
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/2117754.pdfIn PDF document text
    • https://sotokogel.weebly.com/uploads/1/3/4/2/134266154/218c6751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_5f96b8f7ab6af.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/kudex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f874fac4f409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5f94020fb6c15.pdfIn PDF document text
    • https://timonuwek.weebly.com/uploads/1/3/4/3/134383578/cfbd0.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://uploads.strikinglycdn.com/files/99ccf641-3836-4686-aa88-343ab89fa6e9/33807533899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59700588-0645-4f84-8528-5bfc6cf6892d/murirakemu.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/worksheets_for_kindergarten_with_wh_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/wuvem.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/free_iphone_xs_max_apple.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/32023734997.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D3 5096 bytes
SHA-256: 49c4858062455331148eaabae2364e4050d6d4c5fe2c1b0c4e67753ad90dcbb4
font_01_sfnt_off0000e8f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 10724 bytes
SHA-256: d3245a0c52922b519de6f7c5a88fb7c57a4f95d92d162db348edd5519c68cabf
font_02_sfnt_off00010d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D4E 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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