Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1786ffcf2c0c3a…

MALICIOUS

PDF

86.1 KB Created: 2021-07-10 03:38:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e0ddc324173787cc88b15e459aae15f9 SHA-1: 5b55ec58c7c4226d88c59346faf63cb25c958a9e SHA-256: bc1786ffcf2c0c3afaaf97b614903824a0bbf3c6b4b4e1d1c699445db8d27f47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of UTM parameters indicate an effort to obscure the final destination and track user engagement with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://allytemp.ru/uplcv?utm_term=your+smile+melts+my+heart PDF link annotation
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/024a1spbrb42m0d5ffgg9ogkjp/dunonadurap.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/lelivasubotazefuloz.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/3cd1d9964852d2e5f320dfa258a19287/nuvutumanofaxibesogidi.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e8bff2ed69a---93592246795.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/97214721329.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/tgp3fakfji2qe2laovs73qvni7/51835895597.pdfIn PDF document text
    • http://hzdshg.com/images/upload/File/rajajijeso.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cb56482efe8---67906125221.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6d784f22c3---riberesakibejuvemiju.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h6qmd6ju80aelgf47co0o48kue/taroturavifupikolebemon.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21ad12ec0---30706650541.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078df5363b76---wuganolaxoporotizipo.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/rl3en7mu04iicb1qdmakutqk4e/48800255640.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160845c4e74771---bumosipel.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d5e263a11---60014198836.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/16159876713.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a092cf978ca80a06a834be34912f7916/xemoxefepinikuze.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/f2220d9a1fd3d484cf259848c3426f12/44232124750.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/90780309409.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/dujojobafefure.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/97013795233.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/binuzevewavivopise.pdfIn PDF document text
    • http://clase86marista.com/clients/25276/File/metisijidotipufaloj.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_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 16452 bytes
SHA-256: 35c89a71002437471e235f21827ea36cf3f8503d13afb927d99b0d037a237972
font_01_sfnt_off00011b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B66 10464 bytes
SHA-256: c5052c5708dfebf94847c261230591beafff7afbf1c20d00d0e9f5669c976851
font_02_sfnt_off00013339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1