Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fafd0d7fdf0386c…

MALICIOUS

PDF

69.6 KB Created: 2021-01-08 15:38:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3c49399f96f9c9da8659d1531d3b7646 SHA-1: 7808b3150f68c910529f15af243d5eda3df77d6f SHA-256: 8fafd0d7fdf0386c77b6116c585cee27c90dd9ed03e3b310337e1a18ea879161
156 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 heuristic indicating it is part of a link farm, with a primary external URI pointing to 'traffking.ru'. The document body, though heavily obfuscated, contains text related to 'football ground in marathi' and application metadata, suggesting a lure. The presence of numerous external PDF links, including one to 'cdn-cms.f-static.net', further supports the link farm and potential phishing or malware distribution intent.

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://traffking.ru/aws?utm_term=information+about+football+ground+in+marathi PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407304/normal_5f9a55fa2b9b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403414/normal_5fee9a200ac03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8a4d86d4848.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/igicgjH/89303857202.pdfIn PDF document text
    • https://fivixevovisobav.weebly.com/uploads/1/3/1/3/131380347/696ac514a40.pdfIn PDF document text
    • https://bamojatiw.weebly.com/uploads/1/3/4/6/134699288/welife_puwekofofabop.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/2b6acb58-fa28-481a-9b2e-5f944e2e96bd/18447915869.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/statistics_chapter_3_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/birds_sounds_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/accidentally_in_love_chinese_drama_ost.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/noun_clauses_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c51b10d-dc5d-4377-907e-ed6cd26a321a/what_is_a_static_image.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/pegowajazujabinuxobuduval.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f8b3784-b0ac-4ed5-8eb7-d3e7589e10d1/98581793053.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_off0000d241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD241 5220 bytes
SHA-256: 608c7709677807e3b6f69052afa307da78a0003172ec7fc4f3f99c26785e80d6
font_01_sfnt_off0000e3d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D1 11436 bytes
SHA-256: b4d0b32daf0a9c016db58dc59eb1508ecfc83541747bc9b0743482ef8edd2539

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