Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2a9858067b07061…

MALICIOUS

PDF

84.7 KB Created: 2021-09-07 13:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2f7c3d9980f9c430a8a96e26c46311ca SHA-1: 3e069b60effda4e1b15319bcde9487254610b3bf SHA-256: c2a9858067b07061ad8f3eb7575e6316921a29a1926cbc160e320f73ab0964d8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting, likely intended to lead users to phishing pages or download further malware. Although no scripts were explicitly extracted, the nature of the link farm and the detection suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://progetec.org/userfiles/files/lokaxib.pdf In PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/1ba1516a3ebcba792e39807c8d37f258/88980052383.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0c5cc9237---19630471880.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/butin.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/dilonolerexupefukemepefa.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff6bca16c4---jipisofo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b30e9090cfd---60088824803.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/11602301175.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/pfoqc9kojk125buh37gpc4u6k0/suxegodafof.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/9bf29mr584on6udprf48pfv235/78556104593.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/cead593b743e80f64d29841a48c36f96/kojepin.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/23836139561.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c1d169163ac6f22707458439de149841/bazafejudisedufawaf.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/vsgscjp236c5g8vta6ahqh4us4/50518216937.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/jebaworos.pdfIn PDF document text
    • https://connatlas.com/home/conn/public_html/ckfinder/userfiles/files/pizipaj.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/58430296742.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/84484695472.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/76586865318.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607345964edd0---91420883868.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/20820235011.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/nexemetoratumig.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/75101782435.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/bepewoxilubore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=linux+scan+pdf+ocrPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A7 10496 bytes
SHA-256: 91a9082f303fce4ba5446420ae34e6dde7cf3c5bddd9dcc09edebdd2335bbc22
font_01_sfnt_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 18596 bytes
SHA-256: 0ff4c215d1c315b93445a3bba433ac86fbf7e8609920381fa4c36de182f145b8
font_02_sfnt_off00012cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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