Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd695e5e24ecddc5…

MALICIOUS

PDF

68.1 KB Created: 2021-04-11 14:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a4c237551fb572d435631b96dbd396f SHA-1: d8d9545b142fe70da4980cedba97d282d5d5c619 SHA-256: fd695e5e24ecddc5933c034895f52ad0373c349f96729a97a700fc9b1cf0a107
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a high ML score indicating malicious intent. The document body, though obfuscated, suggests a lure related to printer cartridge pricing. The presence of external URIs and the ML classification strongly suggest this PDF is designed to redirect users to malicious sites, likely for phishing or to download further malware.

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 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://kuzutuzo.ru/strik?utm_term=hp+psc+1315+cartridge+price+india
    • https://siximegam.weebly.com/uploads/1/3/1/4/131453251/zumitebogojeku.pdf
    • http://brumbum3.xyz/fi_diagnostic_tool_yamahaq0fq8.pdf
    • http://lugabev.mygamesonline.org/maths_sums_worksheets.pdf
    • http://weinmvc.net/character_reference_letter_samplekw5sf.pdf
    • https://mumerigowijegap.weebly.com/uploads/1/3/4/7/134771458/wotuxezu.pdf
    • https://xonugovelixef.weebly.com/uploads/1/3/0/7/130739086/cbace1c63aebb.pdf
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/ef56b9f2e54e5.pdf
    • https://tusogakesi.weebly.com/uploads/1/3/4/6/134661960/wekewaw.pdf
    • http://dom-bita.org/how_much_does_a_miele_washing_machine_service_costrm9v8.pdf
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdf
    • http://janafan.scienceontheweb.net/mingling_of_souls.pdf
    • http://kafofal.mygamesonline.org/vorulelukedevewo.pdf
    • https://xuxomesepek.weebly.com/uploads/1/3/4/6/134681539/dekijugoma.pdf
    • https://xaxazusilu.weebly.com/uploads/1/3/4/7/134757455/cda00315f4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gedimuta/zidajudofubarukuxadezeg.pdf
    • https://s3.amazonaws.com/pirofopafu/insider_guides_brisbane.pdf
    • http://ruzapuloj.epizy.com/89479076237.pdf
    • https://s3.amazonaws.com/boxalewijim/garmin_430w_simulator.pdf
    • https://s3.amazonaws.com/kujesulad/puzagezujokepediluvu.pdf
    • http://demuremapinob.epizy.com/ratodifegajufizitidu.pdf
    • http://tokipobobanokab.rf.gd/94581511173.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbd2.bin
4ba0117faeec2f3968c612f6d177edd30b92e57e47a82c922228942db623c9b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD2 5512 bytes
font_01_sfnt_off0000dea4.bin
0dd2d66ea274dd9be303023c1d3a9adb71ec6ca77d7fb5317ba734c1ccc57fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA4 10648 bytes

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