Malicious PDF — malware analysis report

Static analysis result for SHA-256 586323188c377a41…

MALICIOUS

PDF

102.1 KB Created: 2021-04-30 03:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6aa4bdd0a6fb3776f6fe6cf507bef44c SHA-1: c6a59ee85ba305236e980fff8a89041b2a6aba87 SHA-256: 586323188c377a410fb95078b04ad4c9f41ab3ff5f7fdd47a5855930148f9e81
176 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or scam document. The 'SE_CALLBACK_LURE' heuristic specifically points to a pattern where the document prompts the user to call a phone number for issues like billing or refunds. While no scripts were explicitly extracted, the presence of numerous links to compromised CMS upload directories and disposable hosting suggests an attempt to redirect users to malicious sites or download further payloads. The document body itself is heavily obfuscated and contains what appears to be metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/cdsjl6k5vsi2lidn2citn6hhv5/janesijuwefez.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/480fa4a6a859a402d4dd7a5e46af0efd/88709469214.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607acf8965081---kobujewor.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607df276b2c1a---galonubu.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077429fa35cd---25091233443.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf3367800c---supefelam.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/b6ibhtjrg0r26e044nc66bsjak/pilomotabixu.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767919855b9---bomigofukonobikebowum.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/fc0736ebgogs69c00g05jo56sg/81165746654.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f2fe4e17c---22874882061.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ded807331b---runanujutisuniluzanisides.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd8585ad05---16329192130.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/5e3405118107ea94b034ca5c5d6d8f07/wefat.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ee76a7ebb---likisizuxikigulikiwejigud.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/905197245db580a31b7fc83f81e8c2a8/21598325797.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2b755df27---55820378419.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706493073c3---vowinidodoxumes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=android+9+call+recorder+no+root
    • 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://scripts.sil.org/OFL
    • 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_off000135f6.bin
c4ddc19c14d0f06ad3d34dab0235a20face06454d4ee903dcbb1b8d66002c3e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 4900 bytes
font_01_sfnt_off000146b1.bin
238487285effe1fa81a1a82c4b6fb91d6a2b20264d25a76cde217ea13e995061		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146B1 15064 bytes
font_02_sfnt_off00017518.bin
2a247a753e8a01f70d7fcfa74e2d7baad7259a755652018209d99d19020bd12c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17518 16332 bytes

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