Malicious PDF — malware analysis report

Static analysis result for SHA-256 06f54c721e7b06b9…

MALICIOUS

PDF

73.0 KB Created: 2021-08-28 10:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9743122048875f8029da0fb163962fd1 SHA-1: dfc938536b187f0835afebb80d65ef8effbbc456 SHA-256: 06f54c721e7b06b95ace386a0d059ab1ed352e6e6803f5fea53f960dfc07e462
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to external sites, some hosted on compromised CMS uploads. This pattern is commonly used for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://allytemp.ru/uplcv?utm_term=synonyms+of+courageous+in+english
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160db9c205e281---41400752693.pdf
    • http://mbcasc.net/imgs/file/26240109403.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160adbe15451fc---37949714436.pdf
    • http://eros-arena.com/eros/userfiles/file/1797230722.pdf
    • https://paroles-vives.com/ckfinder/userfiles/files/77343416819.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/c4qpj3npi2tf8fd7v9ao0gur4o/45968240571.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ea5e85b6d365bb7f9a5e09f8da9c9cc4/rovixapobuf.pdf
    • https://aawyx.com/sites/default/imageuser/file/98347865847.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdee13a236---ziminiponatekodedato.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607191f3d58aa---mikolopasunuxukorewujawos.pdf
    • http://arcstema.com/userfiles/files/35911527494.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d02492ac93---74932333045.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/966b96e326e6b6a4a1cb56fe50b07f6c/44536657578.pdf
    • http://cserepakcio.hu/xdata/file/kesulosebabepomulosefaf.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/aa7d5e3f49584d426c63572d1a914704/pazagumagekoxi.pdf
    • http://jpsacademy.com/slbdavbatala/userfiles/file/rumumizemevujon.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607605ddc72c7---28318801272.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f024ca8826d---namubixaveki.pdf
    • http://j1medical.com/uploaded/file/rasiwikegudusowilu.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2bb0465d7---26092978912.pdf
    • http://architects-desk.com/uploadsfile/25519249372.pdf
    • http://ebiocell.com/uploadfile/file///2021080316195442.pdf
    • http://kingalbertltd.com/uploadedfiles/file/zererada.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ff43ad8fe78---79810382730.pdf
    • http://majorpropertygroup.com/userfiles/files/99680287570.pdf
    • http://cepsagibyachtfuels.com/images/photos/10763981809.pdf
    • http://ifaistos.reality.gr/~triantaf/images/file/81612399437.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_off0000bdaa.bin
14ac5075cb515bced6bc659f806e9b3416f3f898631442e6eba965c4dede7285
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDAA 15200 bytes
font_01_sfnt_off0000e459.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE459 16792 bytes
font_02_sfnt_off0000fc70.bin
68e765812103c98345b565aa34e231ef6ea1c64d1d307e2b3dd9bdb163958d9f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC70 10976 bytes