Malicious PDF — malware analysis report

Static analysis result for SHA-256 907f3681113ed182…

MALICIOUS

PDF

82.3 KB Created: 2021-07-15 16:32:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a6a9cada03da7bb621d5d88ee2d0dd48 SHA-1: c81a0502e595a2c793ff5f5ba83eb8cf940c069b SHA-256: 907f3681113ed18236cf6e44740783c80dbb755987ce5080206be1f3f161b528
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and SE_CALLBACK_LURE heuristics further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://allytemp.ru/uplcv?utm_term=postgis+in+action+pdf PDF link annotation
    • http://allycatering.com/userfiles/62343262743.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/89910268207.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/94841715972.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/zalazijuzikogidexisiwexaf.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/2715527065.pdfIn PDF document text
    • http://bertolinacare.it/file/54357004500.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae9fdebbb869a189a2f0110d013cdde9/wokakofowuvetabawitituz.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/81607752559.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/3dae6aeb25041feab0ff6315e601d6ce/buromaz.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc6256e5f0---79029166237.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/6036566804.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/43416186166.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b05cab87190---42307638881.pdfIn PDF document text
    • http://royalproductsonline.com/userfiles/file/gijonasetutadatutozer.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/38d748da0aed6e88153c8806be426294/zodomesuwomawe.pdfIn PDF document text
    • http://barksdalereunions.com/clients/869108/File/bivenilegos.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/24495310575.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1dc0b4bb1d---fizikim.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/18522148137.pdfIn PDF document text
    • http://xn--h1aaebbkfib4a.xn--p1ai/sadm_files/mobakakonasid.pdfIn PDF document text
    • https://altinhediyeler.com/calisma2/files/uploads/37261150917.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/99537120225.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/85652843357.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/83231355931.pdfIn PDF document text
    • 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_off0000dcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCA 10520 bytes
SHA-256: 9d44564199d79bf458ef9fed7dcef01b98c24a1624a5a395bfcb5ec72f5c3b05
font_01_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 18328 bytes
SHA-256: 35faee72f031cbb7fd4e75850eff8c942d54cbcc75f34ab13fab2e13139d1f31

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