Malicious PDF — malware analysis report

Static analysis result for SHA-256 6118056f03e61b49…

MALICIOUS

PDF

75.4 KB Created: 2021-09-05 08:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13d8b7a9144b6e3977d5430b366d3ec0 SHA-1: 17c3af4d48ad5023bbd5276a78f26b5bf6f49463 SHA-256: 6118056f03e61b49d5a0389ed820f4245c416aa6ff59728d195af31143770c64
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple heuristics and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://queure.ru/uplcv?utm_term=work+engagement+and+organizational+commitment+pdf PDF link annotation
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/xabubarojuviko.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/17083950785.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/57917767106.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/sukase.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/20257565689.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/10158899251.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/bukufiripavafikiv.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/pekagepobakazadi.pdfIn PDF document text
    • http://isvpro.com/custom/files/1577284750.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/d2i479482q2f45h7aq95rejlmd/ligekotoxob.pdfIn PDF document text
    • https://kimansion.com/uploads/file/nujekesonob.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/e0247ddb732fae4d16f96a67e10cac54/98587298467.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/nml65d2mklngipbkaddc3ejhq4/78725343350.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/ziseralonewar.pdfIn PDF document text
    • https://rotherelectric.com/files/zadek.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160b17e6dd725f---rowesudagexotavetati.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/23788b08a8a245db91a39954efc40669/jofub.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/bipaxe.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/28502366265.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/75369271553.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/vasup.pdfIn PDF document text
    • http://pinxedien.net/upload/files/xadovixokuxeluf.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/46916997248.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

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_off0000c43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC54 10940 bytes
SHA-256: 018af4f84ea5f59a33e52a41e12abaf55ecd01ef03052cff85a03b0eea8d76be
font_02_sfnt_off0000f584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 16476 bytes
SHA-256: e006d1133950a6dafda59c94aac7799c8ecc2324490769743cfc98edf9c10c57

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