Malicious PDF — malware analysis report

Static analysis result for SHA-256 280d386615c5d32b…

MALICIOUS

PDF

65.9 KB Created: 2020-11-28 14:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b35ef88be600bdae97905fb3264d430b SHA-1: b65d4a983d9db218c0520aaf0ff216648fca4acb SHA-256: 280d386615c5d32b34fb9543e1d74ed08a2399bca00d1cc33e991614978fbb66
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-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://trafficel.ru/strik?utm_term=delete+first+key+in+dictionary+python PDF link annotation
    • https://vazujupipizake.weebly.com/uploads/1/3/4/7/134719511/jolopezazaratuj-vemevod-levovipeg.pdfIn PDF document text
    • https://rewazifepa.weebly.com/uploads/1/3/4/6/134664269/9b54a22.pdfIn PDF document text
    • https://jivexine.weebly.com/uploads/1/3/1/3/131380908/zakamasuxepas-munitokupa-xumuxawi-mezidaf.pdfIn PDF document text
    • https://velebipuzufal.weebly.com/uploads/1/3/4/4/134434208/ruzulajusefus_xepave_vewixemeterejob.pdfIn PDF document text
    • https://fibavizenimi.weebly.com/uploads/1/3/4/4/134485548/fbdb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5fb6cf7a451b9.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/09a539c8-9188-470a-b2cd-12267da59013/36945512422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcbefb9e-d559-41f8-89d4-cca9cbd02b7e/fimurapusafemewuzin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3825bb7-6023-4dfd-bdac-de5f4d1a10c4/220284143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89db82cd-e011-4ebc-a761-cb35ad5c0858/track_verizon_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdb90aeb-1d79-40df-afa3-a7249ff9c11c/ac_rogue_remastered_trophy_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6da3dc-1b6d-47c3-9aff-ec611870ab64/64245022271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0322f472-ad22-4e3c-8f79-fcf4310f6725/13201123123.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_off0000c3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 5408 bytes
SHA-256: 938f3c48690c8baf9bbd7281086bc662c43fa1f658ec882b58ccfa7ab24c152f
font_01_sfnt_off0000d65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65B 10640 bytes
SHA-256: b7b27cd721994d207357d374126a90bf6e0cd09273dfee2b62d68db409814ef6

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