Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8ec15a4342b4b5…

MALICIOUS

PDF

83.6 KB Created: 2021-06-09 19:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b59cc6aca50d321092bb8f8968ec9659 SHA-1: d70555ff8f514d16eae41b32e719d695236285fb SHA-256: 2a8ec15a4342b4b5d0a89428bfe17ee8527e6285d7b2e62146a3dbc6dce7d86f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm with numerous links pointing to compromised WordPress sites, likely intended to trick users into downloading malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of multiple external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=agni+sakshi+full+movie+hd PDF link annotation
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4369f12cbe---37915311181.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/3a064e2ce5be2a633c8b23096b86792d/tolizibov.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65c203ac98---pesifonuninarerabeson.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160757e5f10db2---16259451326.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/614d87fa0a76e9b1c0365f895943117a/76622518119.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/gabaniban.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/dujewiduzunowawafesowo.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/gujemo.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/dddca7ee53682e3334447e9ccfa9fb4f/zaridapuwirigonevutabed.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/mrsqcfmb473htvqib3gvapghsu/giwekan.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/zajipolubezogeni.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/86680517648.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/747636568c5ce35f6a4fbc86cea1de00/mufatelozojonixipunewez.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/pukutefemajoparelolaw.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084023cbd71d---jokalemegovobuxedolala.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c55c83b026---bisupokuwewuduwojelipexa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd53fd74d2---tojawuzefosopolilijaxidi.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/81737934325.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off0000f340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF340 5340 bytes
SHA-256: 04fc2725dde003f34921e668638148b29ebf1c2166f028cfae58e9cf082d68da
font_01_sfnt_off00010559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10559 11264 bytes
SHA-256: fbee261057da8daba46015de89bff4f0cd164cfb1111676bde52b8bdfdf54c8a
font_02_sfnt_off00012c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C10 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3