Malicious PDF — malware analysis report

Static analysis result for SHA-256 987323192b3c567a…

MALICIOUS

PDF

79.3 KB Created: 2020-12-22 10:57:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 79c1bfb70808b2efa98ecc66c0a55b58 SHA-1: 31fcaff0a953f890c602f4d21b390e77bb7f3088 SHA-256: 987323192b3c567a96ce4f38d7b9f34d87da127299aa7e60e73a41c10a1e84bf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, directing to various websites including 'traffking.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to host numerous links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=heroic+fight+1986 PDF link annotation
    • https://nezijolumuka.weebly.com/uploads/1/3/4/0/134016970/7c7d4661.pdfIn PDF document text
    • https://jawiniralegewo.weebly.com/uploads/1/3/4/4/134492986/sesafesabebuno-bujotin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500889/normal_5fc8971b14274.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369654/normal_5fc9b8c434435.pdfIn PDF document text
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/kagasug-mejodeb-lunum-wepaxokum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5fd07cd057eb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428083/normal_5fad7662bf431.pdfIn PDF document text
    • https://saniwuladekogek.weebly.com/uploads/1/3/4/7/134759819/79e2b6f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427799/normal_5fb6ae172dd0a.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/60a51779-7406-4f7d-846d-71a4f933ef1e/908_bel_air_road_redfin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a796871c-05f9-4e2a-bf87-4e21a35ba8bb/synthesia_full_version_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ade89d-b965-47bd-a807-4ccca207e9ba/womopefeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a22ddc8a-3505-4202-8f2e-5902de1e5c46/11748239871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efda9197-dc5a-4bd5-a1ec-3fdbca6cc9e0/xuripezojodamux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc3029f-b7e7-444d-a8fb-c46a93c85276/young_j_pop_boy_groups.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF1C 4184 bytes
SHA-256: 78d51cc1789fc8aaef65c10729d8ddb68d5e6d4d0a2c1db7f0c3b9368a97d5f6
font_01_sfnt_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 5240 bytes
SHA-256: 6ab4c7d76805726c81135c2316b061d2e7793166f1b77283cdf22dd810f51259
font_02_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 10256 bytes
SHA-256: dc87a31441e412f166eeece1e053a946ae8cfa76675077e7bd71fdd9ff416aa0
font_03_sfnt_off0001128c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128C 18440 bytes
SHA-256: ec6df2a734e4b6f224f9c1ad820d6c04587bace9ca4ca436aee75e3cfd609eee

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