Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6fe30337c4a5e71…

MALICIOUS

PDF

91.2 KB Created: 2021-06-25 18:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad113e9677f4f409dd43c74d7e480e6e SHA-1: 6c4b739a8b7dafbadb8ea817cfd75f3d206f775f SHA-256: f6fe30337c4a5e71855ab145c977304b01ce945548c5c40c568ef7aa5ac002bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/0a8226b2868eb7e620b3c699e52641ca/17206372031.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ae9f05973---20813871382.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3e6c2c08a---98969874472.pdf
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/9a0b10389c7f2b1ffaa92e400dfc1e49/14665771531.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3746122ca9---5407541713.pdf
    • http://getem.eu/files/file/49588939622.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5828aebf3---425998540.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/7119766df9a4aa504045b3bebf933760/gaduviputunan.pdf
    • http://auburn-properties.com/userfiles/files/45009209965.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f52864059---40948483370.pdf
    • https://maclashoes.it/file/48692088109.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/27cf2c2d778d82af054d1c2f90717e8c/7799814010.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/6072f0fa6d816ae1ff5c2be26109fd6e/titujewegu.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a795202d1f---64597345998.pdf
    • http://mmprogetti.it/userfiles/files/bujakugotumapiv.pdf
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1eab82eff9---63803585810.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/g8l2au60s97sdmj7e8d60hgan5/15389082790.pdf
    • http://nappsa.org/userfiles/file/44885865529.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160775636dc7fb---87928024192.pdf
    • http://akcjonariusz.com/UserFiles/file/zumepoz.pdf
    • http://ahchala.com/img/file/19558394790.pdf
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/6jg7jhv7dto3672c65da46b8k5/satilowipikadufewimigijot.pdf
    • http://agiusfuneraldirectors.com/files/file/gejolomi.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6bce131fb---givifozemibenu.pdf
    • https://scriptdd.com/_file/file/jaxifevidipovirimidiwebi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=me2+insanity+guide
    • 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_off00010011.bin
e491c421d67c1a0c1bcd46ae976fd647ca970d21e5c6b7b2e44b94c4002581cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10011 18528 bytes
font_01_sfnt_off00012fbd.bin
53f7744c116ea45b908378451c9b7aa7642cc00d98bf8485f5f60857d3d8504a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBD 10484 bytes
font_02_sfnt_off00014799.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14799 16792 bytes