Malicious PDF — malware analysis report

Static analysis result for SHA-256 9987008b79c4721e…

MALICIOUS

PDF

82.4 KB Created: 2020-12-31 15:22:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d16d37627207f932f24b9b463615a54f SHA-1: 1554db51cd445e4e68d3847b3873f3f4ebea73ef SHA-256: 9987008b79c4721ef7ccb0148629ae5e68dac081aef4192f4b45d747caeb70f0
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. One prominent URL, 'https://traffking.ru/strik?utm_term=life+is+strange+before+the+storm+ps4+game', is likely intended to redirect users to malicious content or phishing pages. The document's structure and the presence of numerous external links indicate a deceptive pattern aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=life+is+strange+before+the+storm+ps4+game
    • https://lotigasi.weebly.com/uploads/1/3/4/7/134705720/witaxeka.pdf
    • https://videxopefofima.weebly.com/uploads/1/3/4/1/134131768/f085f0a43baf63a.pdf
    • https://kedifekutijita.weebly.com/uploads/1/3/4/7/134713117/4075632.pdf
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5fd09bc1decae.pdf
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/saduxasuposuvit_madademabosapul.pdf
    • https://nabolonoroxene.weebly.com/uploads/1/3/4/3/134373159/a3f5d0cdb.pdf
    • https://watepiwod.weebly.com/uploads/1/3/2/7/132710700/napizuliwoviwe-zoxezamipapiz-zuzufot-turunebat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zalomi/friends_quiz_and_trivia_app_answers.pdf
    • https://s3.amazonaws.com/setikizo/79246158229.pdf
    • https://s3.amazonaws.com/dazifozixawus/62145348404.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d2.bin
6bbf4b7703b8b75b5596a0298306650474c2c3be251aeebc219e00de831a64de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 5240 bytes
font_01_sfnt_off0000f36e.bin
50aa82ad4d2c068026c448f061927b1134d40cbdb0eed9eefbad16c138b43644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 10916 bytes
font_02_sfnt_off0001190b.bin
794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1190B 16168 bytes
font_03_sfnt_off00012e11.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E11 4324 bytes

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