Malicious PDF — malware analysis report

Static analysis result for SHA-256 574656dbed765b99…

MALICIOUS

PDF

81.1 KB Created: 2021-10-06 08:50:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f3224209236d0738c355a439a1630260 SHA-1: fc1a17dc5531d81486494a0c9844318933d2e3ab SHA-256: 574656dbed765b995135aa41a634c8c0fd4668a01d929bf92b2368fbd0ff5115
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a strong intent to direct users to external, potentially malicious, content. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://queure.ru/uplcv?utm_term=soul+eater+sexy PDF link annotation
    • http://bentleyplemtech.ru/userfiles/file/20975782116.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec18902514---67418917212.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/lawowavibobijojobevezav.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615be9bb57075---35780011717.pdfIn PDF document text
    • http://gutachterbewertung.de/userfiles/file/58996351284.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159d01e85cdc---fenovuf.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/busele.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/rigofafuzul.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/psel6r3h4bu8hqnt71bvr53hs4/89382282064.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/toxilekopividakukag.pdfIn PDF document text
    • http://fiorenzuolatrack.it/userfiles/files/13881642931.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e34cd9f86ded2fc6801e421a896d579d/92928252312.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/gizigoli.pdfIn PDF document text
    • https://ixiu-23.com/uploads/files/202109071125578441.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c96d5ca9bd---62697527469.pdfIn PDF document text
    • http://immobilieninvestors.net/userfiles/file/32900382824.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cd3412616e9548a726e46990b4c6c199/rinarozerodikopekulimi.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/bodetirexanuritilaseg.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142cd6f57d20---40562485336.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/pakobifesidirojufa.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202192602286104.pdfIn PDF document text
    • http://plantessentialoil.com/upload/files/visaw.pdfIn PDF document text
    • https://foulardfotografando.it/file/xoxaxaxapezexubukusuzukes.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_off0000dd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF588 16312 bytes
SHA-256: 821fe964346107896de49cfdd39a0967d26df628dade9dbecdbe2f559d856a7b
font_02_sfnt_off00011fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA6 10296 bytes
SHA-256: 86c111911c117cf996b15f3de02d63eaf65eefa15598da86d2a6e51c1f2b28f4

Open this report in the interactive analyzer, or submit your own file for analysis.