Malicious PDF — malware analysis report

Static analysis result for SHA-256 2389c39c12d01f7d…

MALICIOUS

PDF

82.3 KB Created: 2021-09-07 23:02:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b7b83fa3865096f4a443e1ff99ecd14f SHA-1: 065139079a9bd7539bce8ca878bc09ab9af80e89 SHA-256: 2389c39c12d01f7d551733b15a67636e1072d7150da6de2b431f8afc3f92752b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URI heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.sosonomo.com/ckfinder/userfiles/files/boxezomosowofera.pdf In PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/jirowozeziz.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/lg2f83a9qordisjnl4kf8iq6p8/jutef.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/10236317015.pdfIn PDF document text
    • http://futureinfashion.com/ckfinder/userfiles/files/turuwe.pdfIn PDF document text
    • https://penal-garazh.ru/files/nufojugavolozutik.pdfIn PDF document text
    • https://webmenuplus.com/images/file/xabufapisunabafanumis.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/wasekakaxabititudir.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/99ae0b074d5b3e79e75643e0391364f5/laletuxe.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/34bg1sos6d0pv7b0udltjkgl7q/10657514814.pdfIn PDF document text
    • http://446888.top/userfiles/file/nigufabakuxuvuruwo.pdfIn PDF document text
    • http://theettiaresmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/gigexilabif.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/o8rfn0kk9kpb6083k2sh9toei0/10838051508.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210713041420.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/99769916415.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/1ljvdio32s2d5lgbi63qacnpc3/dabesivagewapak.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/878b21dbb514d544f86b6e2d30436c96/23467308089.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c4566f75---96424322641.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/r66rh6aljk89gscqk1ugkh6863/vexatililumivufibudir.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/82230015624.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b64ddc2d86---rokirivafivifosixego.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b4f76ab1e---15197036773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=suburban+water+heater+sw12de+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 18060 bytes
SHA-256: a7e39b50d4e4648630a0eda8e1f896d9bee45d3cbd96e217664519e0de399b3e
font_02_sfnt_off00012218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12218 10876 bytes
SHA-256: ee1f4ab13afe7490853a8a8f7895e0f9da01ded510393578a3d3fc9d25d8131a

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