Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e59d042949c2a4a…

MALICIOUS

PDF

89.1 KB Created: 2021-06-27 00:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0bb0e28a322474d80156e75903effd35 SHA-1: 41f2300dcea912a0b2e41fca14199efad1950fbe SHA-256: 7e59d042949c2a4a5f76a89e38611f857f3789d3227fd1120f626c96b8db0a69
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm and a potential phishing lure. The ML classifier and ClamAV also identified it as malicious. The document contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://files.ibiza-ferien.de/file/vidime.pdf
    • http://sevoir.hu/uploads/file/21482371910.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/3cbdbe98737402a7d30a5c8ec738aa01/52767963692.pdf
    • http://cuanhomkinhtoanthang.com/media/file/616561497.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70ff488500---23884847849.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e9046f812---36793421002.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/e6fb0355d8dcb371eb6db7d0839c3b5c/muwijunokukilak.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7ce50752f---19725048966.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094ea181449e---bivimojof.pdf
    • http://tragadsonisurat.com/ckfinder/userfiles/files/wemataseri.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/530ede7d151dbcbd03a4fe4a98b3bc9b/gumimegitezuxafanuxoxazaj.pdf
    • http://imailbox.nl/images/uploadedimages/file/tobirituwekonaxudup.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/nssl65juecfhppuhn70rk7n5a3/23035117651.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97bb5a221d---kisevexeju.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a861802b88f---refomidubejinep.pdf
    • http://firanywiktoria.pl/uploads/editor/file/rulowawujigebavok.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16090d23660bca---libopipejepuzuw.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa382e802f---50731788405.pdf
    • https://betalinktech.com/blmedia/file/61803604489.pdf
    • http://aplus.to/userfiles/file/48295871271.pdf
    • http://mmckno2010.zkosuchdol.info/files/nofesokakirukuboleruf.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/dd9342c782e024ef1a729569d9c5e2a9/nokepamometadurakanud.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/eccb7869c829eae9beb41a342b162c9e/teravaw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=sexually+suggestive+definition
    • 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_off0000f1d0.bin
152c145b6cb4bc6ebe7179ad02be3a73689a819e63bb08237c2869d6cdf81978
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 10888 bytes
font_01_sfnt_off00010af2.bin
9025e6aec3ea72cd725b7be72ea69ecab20689dce01af116e1bbcf40bcf086c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF2 19072 bytes
font_02_sfnt_off00013d94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D94 16792 bytes