Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9507d5cd78e746e…

MALICIOUS

PDF

89.3 KB Created: 2021-07-01 23:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 362716f634e078b726c09bdbdabe1d7f SHA-1: ede9162b84dd181518dc79c88820636de762e36c SHA-256: f9507d5cd78e746e1248bccaff9fefb07e61b913e3494a7c32a31adff0879050
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest MFA codes or session tokens, a common tactic in credential phishing. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest a link farm used to distribute the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://slsnn.ru/content/file/fetirezivakezo.pdf
    • http://myxroad.com/upload/userfiles/file///15008723673.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/9a32e38dd25be6ec2e7be507d0ae5d18/31959823235.pdf
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/deselikaf.pdf
    • http://nowyhotelik.pl/userfiles/file/3711042163.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948de841532---51965702159.pdf
    • http://jtour.vn/userfiles/file/91482154549.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16098a464b709a---18195450157.pdf
    • http://pulsarvn.com/media/ftp/file/jibamiwixedoza.pdf
    • http://absolutelyneon.com/userfiles/file/gejudakakelebunosup.pdf
    • http://ecompletecontact.com/ckfinder/userfiles/files/94810178636.pdf
    • http://nail-free.com/ckfinder/userfiles/files/30706747508.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8759e8c078---bowuzebavupefoxo.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sk5iisv9gr9i4b45c7c3o3qrj4/luwimekixekag.pdf
    • https://2acontractor.it/images/file/kezipavoxore.pdf
    • http://mega.kz/media/upload/files/94506838524.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/6eb33c17b2dfaa5cf8bd6dbdd375f7bb/letikofi.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1cc92113bd---86108690562.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/futis.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a7c361ec6---nuzewivokotobetazizom.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081551651a3f---71379586512.pdf
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/b97fc996a722f4933e62b3509cfa8a86/59171001216.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1169e9d27---44585629215.pdf
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/2d0j5pd0vkq8lp4rlhb7esf62r/88262507112.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ad%26d+2nd+edition+dungeon+masters+guide+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_off0001028c.bin
455fea37d49e369bffb33f69d9d747ead77c818950caeb0818ce46e1e69ba2fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1028C 16524 bytes
font_01_sfnt_off00012d63.bin
cec472d94eb3fdb0df358ebc6477a54accfbb063ec4a1f62a798cb8c4131dde5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D63 9192 bytes
font_02_sfnt_off00014094.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14094 16792 bytes