Malicious PDF — malware analysis report

Static analysis result for SHA-256 767068a184298369…

MALICIOUS

PDF

82.3 KB Created: 2021-06-26 05:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e24b7dea0eb171195324ba887747aab SHA-1: 98f3c7971dc9705d8b2999560aec83e871fef27b SHA-256: 767068a1842983694bf5fa596b15fbaeeec7edab58a86db9dd6019a111e61a13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content, likely related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://kameleonhastanc.hu/files/file/20134092874.pdf
    • http://ashioke.com/images/library/File/12997148039.pdf
    • http://stark-tools.ru/images/uploaded/salodibesemavetiwofal.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/ff40070548f330ba8448ca42d11251a4/felajiretoguweb.pdf
    • http://www.bluewhaleline.com/image/upload/File/manesilopi.pdf
    • http://pphu-joanna.pl/fckpliki/file/62812564742.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/5i6ovi5s8l0d9n7frj022a0pra/fagitilinezepafanezipaziz.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2acc03f90---63507569755.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ff57ee529---91194661651.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f8e4efe90391eb4ca554b242d249be4c/60372134234.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607818ae830cf---badenukorixuponosu.pdf
    • http://ks4073.com/file_media/file_image/file/45788109702.pdf
    • http://familycrawford.com/clients/3/31/31f1fdc6e90c562b7578e9c437f7c1bf/File/38881438080.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8b634994391971a831f6a3fa0764fb7d/32026362477.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090232229572---mafazebuzus.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/h8et6nqb3q0iocjajcu1cgm39t/37132141330.pdf
    • https://africanresearchcenter.com/userfiles/file/25316320576.pdf
    • https://designclarf.it/file/96371659802.pdf
    • http://sisparts.pl/zdjecia/fck/file/22991856581.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a23105c0c1---zabotew.pdf
    • http://grafordexstudents.com/clients/0/05/05b3dbe7dd9dc6f92b523d2b721f2ffd/File/vilemogeruxu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ms+office+2016+free+download+full+version+with+product+key+for+pc
    • 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_off0000d892.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD892 16792 bytes
font_01_sfnt_off0000f0a9.bin
00d1ede0fc9a4fd6025ffa36b7bff9dfa5586f7d3ff1ce5e7bec752b51cd230b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 11632 bytes
font_02_sfnt_off00010c80.bin
0a57c7b49ef5eaf71cf3cd99a9c0f87aebf8663f9ec102ffaa8e9b1ce66a653c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C80 17544 bytes