Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e884bbc72d99db…

MALICIOUS

PDF

86.8 KB Created: 2021-07-06 16:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 70a05ebf8fc7cd05ea6c61089cb33d78 SHA-1: 6526a406cd13990e774edcd37df1f83870afbf83 SHA-256: c0e884bbc72d99dbc336a0c58d6ef8b6a8feca43bca1996bff180c1e5fde1a90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content. The presence of external URIs and link farms suggests an attempt to lure users to external resources, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=best+code+snippets
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160dae310bf8c9---82249071335.pdf
    • https://topclassgardening.nl/images/file/nevusakosokebaraxuzo.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d11a2567bdc98c6f96568c4295118341/41645237516.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/v23oo6tsbs0op1ukv730557k64/jojalibijowotugubo.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071260e56d50---samik.pdf
    • https://sgotomotiv.org/upload/files/valexinu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8a14f209f---34497884989.pdf
    • http://casier-a-bouteilles.fr/file/posuwogilapawow.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/adc052f23713fbc015a4c76c85c30f01/mufezupiberugem.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa2ab31c84---lunomalujan.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e35d665083---67888461370.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e053c5cf---pitij.pdf
    • http://teplospectr.ru/images/files/tegumejin.pdf
    • http://bocghedanang.com/media/ftp/file/rupeg.pdf
    • http://ajisushionline.com/uploads/files/tonadigejewulifumadif.pdf
    • http://gursakaryahukuk.com/images/file/62428603272.pdf
    • http://wksystems.net/HotelEstimator/userfiles/file/weziwej.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e717d59f---49887061917.pdf
    • https://bloomeng.com/uploads/bazaxoga.pdf
    • https://master-service.ro/images/file/477158614.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ded56462b8f---porikumamuvo.pdf
    • http://chickenwild.com/upload/contents/images/images/12732121165.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ddeaad5e03a---34652849506.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c14b463d8---nedabad.pdf
    • http://bogelaipigeon.com/upload/file/12773141482.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05d.bin
569d2c889fc629b7b4d1b92156fda0fa3acba64e06d9176f33e6e958fc69f71f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF05D 10252 bytes
font_01_sfnt_off0001078a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 16792 bytes
font_02_sfnt_off00011f9c.bin
dbb85ece9b61537c8a8aa5d12c4243e3966084beef9605b208dade35663933d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9C 17880 bytes