Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a79d6a479aca8ff…

MALICIOUS

PDF

133.2 KB Created: 2020-12-23 13:09:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7e374d92a51130124ddfb9e704678ced SHA-1: 272217a1de8963ffd7bfb8a68b5317f52ee8967f SHA-256: 3a79d6a479aca8ff493ad5ece5e577283d0b60b1003477eb069ba402b6a5fe05
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 flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains a large number of external links, with one prominent URL pointing to 'traffking.ru', suggesting it's part of a link farm designed to redirect users to potentially harmful content. The ClamAV detection further supports its classification as malicious. No scripts were extracted, but the structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffking.ru/strik?utm_term=versus+fight+ccg+brawl+mod+4.+17 PDF link annotation
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/f4f9f865deebe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f87a332eba64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8c9c2aa2f37.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/ruxapo-nosovupifegi.pdfIn PDF document text
    • https://rodekimixew.weebly.com/uploads/1/3/4/3/134314341/8051689.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/57c6456b-c098-450d-b885-ed75b39f1037/usb_tv_tuner_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4fe357e-275a-4579-81f4-3071aaea518a/kubiwuzisadoporo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082769f2-ab14-4e70-b577-ed4be94a715a/nasty_gal_white_boots_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/89362446585.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02054b26-fee3-4fd8-8059-0b0adfe6d9c7/installing_and_configuring_windows_s.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb2d1b87-1dd9-477e-baf0-f709efc252c4/dursun_ali_erzincanli_gelseydin_indi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3aba362-1cb8-40c7-b0ff-0525b455177b/24832861882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae2ec9a-fd8d-45b6-a40f-276caf745c59/94506252153.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc00b02-ab40-477d-8f79-2539066935ef/fema_the_operations_section_chief_does_what.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0502dc36-8eb7-4a8a-9c23-d25e4ab56886/pizedukisabasexate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bdeec4e-48a7-4519-8ff6-7077cbd82cb0/kuxivasukafarekozibes.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/vasurufedogolo.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/64759882237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67dbf709-3cd1-4460-8edf-adcb08961eba/37280782868.pdfIn PDF document text
    • https://s3.amazonaws.com/pokixovuxik/damijulemetodato.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/26534646963.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_off0001b8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B8B6 5192 bytes
SHA-256: ca0dd689bf86b98ed902b7301475e5e3ddd07cb9c2a3a230451156009f6ff09a
font_01_sfnt_off0001ca9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA9B 5884 bytes
SHA-256: d68df35e68de460ceee8b26533686dd52745843a506cb5a410193bc478949e24
font_02_sfnt_off0001dea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEA5 12132 bytes
SHA-256: c27b1ecfa6fdc0ec27b7236312b0052d872b07e19392aafc54c3dc34560c54d7

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