Malicious PDF — malware analysis report

Static analysis result for SHA-256 797203116e021884…

MALICIOUS

PDF

86.2 KB Created: 2021-07-07 07:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7467082c0889bd849f6777441339dc10 SHA-1: f8c734bc9e9fd0e78edb636aacd642149043d807 SHA-256: 797203116e021884ae0231b2678506b48cb4123b85df5e9efdf40447f46010d6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the primary attack pattern involves luring users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/uplcv?utm_term=to+be+a+sweet+tooth
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/1a2dbada1d027f1ab662df7dc3585145/32902563852.pdf
    • http://goteneplast.se/files/images/file/pudoserar.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087483579254---gebanuvanatifemonisubewud.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e31303e58d---boviwefakap.pdf
    • http://travelci.ru/ckfinder/userfiles/files/8135598045.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1f9b073a9663f502b066b0f78355f1e4/39524887394.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e9114528c---67422397092.pdf
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bafitujapekafukumimujop.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/phq3gf9fp1k3ng8tlle1akm7d2/69979108248.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/5090cf353eed52b808dc54d80fbf953d/meduxarivolovokumosetal.pdf
    • http://hotelbelleepoque.bg/userfiles/file/nizilatawe.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8f263f7036c12185ed1c29e2a206c73e/wefagowemuziwewuvikuwevun.pdf
    • http://stacjaregeneracja.pl/userfiles/file/tofotasetojav.pdf
    • http://i-daa-wl.de/userfiles/3134160858.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/a3ee630edace11e1d00839082482bed7/mozerolivakad.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/cbe2bc6e2ec6514c6922d32d21ede7de/43461658676.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a23562f25---8508297115.pdf
    • http://acecaalcoy.com/userfiles/file/2717577244.pdf
    • http://absolutelyneon.com/userfiles/file/66342896716.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5e0a152241cdbe1c2ff7ea18882a808e/kinaxapoviramenemavowefu.pdf
    • https://lacaune.hu/userfiles/file/19240599677.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/muvex.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f042.bin
e61e24198686466a0220c33c97fcb48bb891c002c053163bd770e3e53ae40d80
pdf-font-stream PDF embedded font (sfnt) at offset 0xF042 16776 bytes
font_01_sfnt_off00011bb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB5 16792 bytes
font_02_sfnt_off000133cc.bin
27e2a8ac5170ede2f812c6fa5ac8e733abbfed494eede6cecd70845015f0e810
pdf-font-stream PDF embedded font (sfnt) at offset 0x133CC 10052 bytes