Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d075fb2566b8fd…

MALICIOUS

PDF

95.3 KB Created: 2021-09-03 20:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5132bad8fd3c8e5e1d05151c1bcc0e18 SHA-1: 04d7e108c370825cb849fef6a4d1342306004e69 SHA-256: 49d075fb2566b8fd8af7d5fc6b34fcd9d11130ef8e8017da72cf4576484f8d2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://pixomot.ru/uplcv?utm_term=suunto+ambit3+owners+manual PDF link annotation
    • http://lexen.ca/userfiles/files/womatefusakopitisugifewuj.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210630_5C8BF1C2385CE6E7.pdfIn PDF document text
    • http://bronia.org/userfiles/file/90914945432.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/qh67if2be3u9612d0ffbbl0f9t/forezore.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df3a9f36d5---sevujalijudefodakufomo.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/37292291193.pdfIn PDF document text
    • http://jsdarvin.com/files/77899238294.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/fasowawebivamonivuzupuro.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/97574000568.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd58820d78---kijiruzekipisanajukaralo.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/75693752337.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/66686628433.pdfIn PDF document text
    • http://flynewsletter.com/uploads/file/74157936046.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7fd3aacf752f069bb52fd2b4312965e4/6369920952.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/sakavudozikupe.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/nezisodikojosu.pdfIn PDF document text
    • http://gmkms.net/upfile_editor/2021/files/44377200520.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/f3f3d359f181255cf2b0f65efc635f8e/rafogadavovejarupiv.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/jiniwimopepebelizox.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/55216304179.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/widebolobirup.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_off00010c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001246a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246A 10840 bytes
SHA-256: d1d3c1492e7b5ec5bce9e98afe347438ecde5e339fb1ecd788beef9325f9b480
font_02_sfnt_off00013d7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D7F 18884 bytes
SHA-256: f4a6a1658d0176bbda143b81d897bb87e704d8a2ca4fa9e0293d8aca8be16403