Malicious PDF — malware analysis report

Static analysis result for SHA-256 9007c145c8b717ac…

MALICIOUS

PDF

79.8 KB Created: 2021-09-04 22:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe5f41d2f52dd8e8482c3634cb8ce024 SHA-1: db92566cdef99407fa153ae30411515c4fc0860c SHA-256: 9007c145c8b717ac3df3337484e0318cc3f3876e01607178249ba00c35731929
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/f0a96bbfe510ed2d9c3d4f3a608a7495/4838711946.pdf
    • http://sbkf.org/files/files/lapoje.pdf
    • https://olivier-daulte.com/ckfinder/userfiles/files/43463688252.pdf
    • https://journeywithmypet.com/ckfinder/userfiles/files/gugove.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610592aee41ff---kupomepojotuguvujeser.pdf
    • http://www.peritaonline.es/ckfinder/userfiles/files/983206457.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab19b02038---30458484612.pdf
    • http://bhs1966maui.com/clients/64750/File/75322381229.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094314640221---3256393460.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ni2nmndm84h0tlj706tj7ue8q1/pagabe.pdf
    • http://autosoftware.company/autoresponders_images/files/37679173497.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db16c59408---33453886216.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/nanazalokaf.pdf
    • http://frigotechreina.com/userfiles/files/91429111443.pdf
    • http://clinivetmadonnadirosa.eu/userfiles/files/36298714788.pdf
    • http://srsheicha.com/uploadfile/file/faxekerafekufemipajifigo.pdf
    • http://greenld.com/userfiles/20956264489.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608084ae8f2a8---gelezusetaxisomudadi.pdf
    • http://randalljroutson.com/clients/44711/File/84507201612.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9de91e5cc---zafamudotilazil.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/71205718be5e9ddacf26c89eb5181078/69306618637.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe7468974b---67375833526.pdf
    • https://zionapostolicministries.org/uploads/file/43345097311.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/c53b5ac9804eea9514fa06393fa3a1d5/13129753164.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/33361547510.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=multiplication+facts+worksheet
    • 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_off0000d6bb.bin
4d8236669e5f77a0c3b00c01555a785f96c718eb501418e1fa1dc29e3592f3fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BB 10848 bytes
font_01_sfnt_off0000efd5.bin
1ee13af77fc9d157a7069c3923b0795a1cfc42aaf5e9ed4f5e62fc90e768a8d2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD5 16132 bytes
font_02_sfnt_off00011967.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11967 16792 bytes