Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd4abb5b1469cbc…

MALICIOUS

PDF

84.0 KB Created: 2021-06-30 17:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48b195e298b79d30468aef55a7f3bcbf SHA-1: 7052d37af7cc032e63c8a53f621765a5434767ab SHA-256: fbd4abb5b1469cbcf1179657f4a104f5a0ce663ff502c75e9edc3c08e23826ea
196 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a payment redirection lure. It contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the heuristics strongly indicate a phishing or financial scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b105d0ce686---pajotuvidupoludemuli.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/502f2be14aa70cdd82cb241f02eb7a90/gugotijegiponavopo.pdf
    • https://transport-vehicules.fr/userfiles/file/92427412551.pdf
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/eja5e0tmmc8rik6g3b04sorrq7/bisukiwuze.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/be0fb084e039367fa23f30b4e645a257/vilimunebupotipafovi.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/dajapopimo.pdf
    • https://alajuusa.ee/media/contents/file/58505860753.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1436d5df02---rometekefipepo.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/40ac2a9134f1fa8bbe3684ba0aaab855/wupejawok.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/8611a3462837123e60a2a1594646c575/jozolukamigivukatanuwaxu.pdf
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d5668d992---62960368409.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f013d4a00fee7de2f455a8c800f8576a/negadugukawi.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/cfb001499343e27b371414675266dd31/31062017679.pdf
    • https://dienlanhhonganh.com/images/pic/file/nevavuvukok.pdf
    • http://liberty67.com/clients/41815/File/buwuwuxuluwowazil.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbac309a29---45192896975.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070420e76ac6---51826776878.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8e244f3ba---wexaxarovotunolixido.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/kgjoi8utk2v16s2a4nl7atsrrp/vopeti.pdf
    • http://huntland.hu/upload/file/31617450092.pdf
    • http://buergerforum-tirol.at/file/letapasotiwevufuxolugumes.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/76e1deb354b991b856b115fa5b46075a/5755073710.pdf
    • http://dansecyr.ca/pdf/file/86536890375.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/54eea44447fef602a22946f3cd3ba56f/viferi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=electronic+fund+transfer+in+banking
    • 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_off0000e54a.bin
b39b4c2a5969b639ace43dd1a1be671ac1dde1d2fa180db2c6a32d10e9bc2964
pdf-font-stream PDF embedded font (sfnt) at offset 0xE54A 10964 bytes
font_01_sfnt_off0000fea3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 16792 bytes
font_02_sfnt_off000116b5.bin
78367844605a58d88ad4c5a5689e0a7a3c8d6a3595c37c711876a5212259c37d
pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 16384 bytes