Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e96d5dfc5d9f7a…

MALICIOUS

PDF

84.7 KB Created: 2021-07-04 07:58:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d5abd3d7e3d65fe774f00e24eac05e7 SHA-1: 050fc46d6a89f1fe9848e22d6d9a49ff9b5804e5 SHA-256: a4e96d5dfc5d9f7ac14aa8b9a3c99241a8fdc46135995d247e0a85ef37d7322c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS upload storage, suggesting a link farm used for distributing malicious content or phishing pages. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number for a fake issue, a common tactic in tech-support scams or callback phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crewmak.ru/uplcv?utm_term=blurred+vision+and+flashing+lights
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd7bd61165---75638864300.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609268609795c---41145301522.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/pqof2o8dlhloc9ke8bf4ee31j4/50671749939.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed0fe9eb9---giguvarojizumika.pdf
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/2513166467.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/uk5f52nl1pe3nn003j4ak022mg/20091359150.pdf
    • http://vanphongphamhienluong.com/upload/files/sefalabutonepodevidepifu.pdf
    • http://gillsandgeckos.com/userfiles/file/58575537995.pdf
    • http://sukhabalka.com/files/file/53963123744.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab15e4e6538---wafasepovimoki.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160be58f68210d---94847448007.pdf
    • http://songiadahoaian.com/upload/ck/files/94316605945.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/87b09e67837aebefa11732d7ecaa80a9/18021690083.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712eb828261---23628232858.pdf
    • https://wineart.online/userfiles/file/44363208406.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/ard6i2b2u8r23mudo59rudh390/nivulovisegoxomufobob.pdf
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/7efdbe081bd5aa1f3c62c298084f65d4/40853704382.pdf
    • http://lotusromeo.fr/app/webroot/files/userfiles/files/dupelimopamawivivodegubag.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609890d716352---22040718340.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/niwelomubezuj.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da9e39f1b3d---65176953315.pdf
    • https://koratspring.com/upload/file/salobuxegudemagakiju.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1d9f684af---zunego.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608462509ff5b---felatame.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_off0000e856.bin
14ffd65b2b7c6b5909672f4490fb53ae30efc3541558016c079133a8aec09a68
pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 10852 bytes
font_01_sfnt_off0001012d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 16792 bytes
font_02_sfnt_off0001193f.bin
58bcdf16a8d58fe17343e38078ba0e75dd2857244a075a6eace41a9f8ee1206f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1193F 17000 bytes