Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc161fa2d9cb1dc…

MALICIOUS

PDF

165.9 KB Created: 2021-06-29 20:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 795c0e50106a6722e69fa79b39bebbba SHA-1: 5b10e60f4599b79a405c105bd0a276be584540f1 SHA-256: 1cc161fa2d9cb1dc1874c5bc2616765f252ab4dd0970b972aaeedbbd489f410a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many of which point to WordPress upload directories on various domains, indicating a link farm designed to distribute content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The document body is unreadable, but the heuristics and URLs confirm the link farm pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9903

Heuristics 6

  • 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.
  • 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://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160820718ec15a---21581333151.pdf In PDF document text
    • https://ferropula.hr/files/36308143150.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608832e18ae07---doverew.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/ladagazipunebubitotidurug.pdfIn PDF document text
    • https://andrejc.si/files/file/44364822324.pdfIn PDF document text
    • http://allasclub.com/campannas/file/fowowudesovosewinonuxezal.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/88527626224.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/pofokaweludidefan.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/99099685eb914806b1b23adcea3b260f/lokorunazuzawifaraba.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/hnvin5rhclf0rehd8ol28j5ig2/47071515962.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160be8213b3c68---5441813540.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f29597081d---81173421088.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088586f27cbe---vizuxiperadi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd822e1475f---ronukujomatuwolito.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/jobivunidado.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c14e78a9e22---28076731654.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/915mo63b9gvvevfg0emnuov499/63487470135.pdfIn PDF document text
    • http://bbbswalkforkids.com/clients/c/cf/cf8d0549bdc9bbdffca8bc0db9808b96/File/gebagavazonokomap.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/osor3eqnbrbr3io0lfmunh32p2/saviwefuwodidimupapate.pdfIn PDF document text
    • http://the100voicesofgospel.de/fichiers/newsletter/file/pujojagibusorumarovije.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/da81556b4741514786035f5729280277/xarorubawonajojisokekaxi.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/zowejebikiriw.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/18080202176.pdfIn PDF document text
    • https://magerp.org/upload/files/82809346431.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/puluzoxize.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+human+condition+arendt+pdfPDF 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_off00022a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22A7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002428f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2428F 18472 bytes
SHA-256: 42a9ea335127ae26d96ac752a1b77b0eba762193087db5e4ea73edbd324c4f40
font_02_sfnt_off0002718c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2718C 10732 bytes
SHA-256: c0b60c4abe9eb04a602f85cf2fed3e095bd0916895d7004757180c77922f1d4e