Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8109c513e6e00b…

MALICIOUS

PDF

89.8 KB Created: 2021-07-23 07:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57f94b241dc046566a4621eed32b6e53 SHA-1: d75722c5119cba0f6a66fc6b57bd90dcf2173949 SHA-256: fe8109c513e6e00b1ee6371fd57755bca136f955b93ad49f5c4aadaf10a33632
176 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, which likely serve as lures for phishing or malware downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a73084de6---pozakonajeturikezedavoxox.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/ba7ec179ba4221f8304beecfdc75bcae/parupesob.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/15074203283.pdf
    • http://jamessham.com/admin/usercontent/file/zalafukumepojeja.pdf
    • http://tentauto23.ru/ckfinder/userfiles/files/tikezarozimif.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/242127f8ee8393001bfe0cc96678e3ae/kevejitiwasuvevizi.pdf
    • http://auto-spec.ca/fck/file/lumagenevazulozawukepumaz.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/605f47f20814694cc84b251a07296b16/bomeguxumilofobavidak.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42ad5194cf---58531434534.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/37ef4d33b911ece24869f817588631c0/nakujebij.pdf
    • http://stacjaregeneracja.pl/userfiles/file/95113259947.pdf
    • http://przedszkolenisko.pl/userfiles/file/14703943499.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b188409a2f3---gabutos.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/cpp5tt86djhh7rhboigqmi1q3f/84422248038.pdf
    • http://esipro.lu/userfiles/file/lurox.pdf
    • https://mimpisiluman.com/contents//files/89156654487.pdf
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/ed72229cbe47b6abef236845eaa5c71b/56332824551.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba1e0cd692---38730463489.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce11deb5914---tilifiwabilonitinidexolof.pdf
    • http://cokhiminhhien.com/media/ftp/file/wexipixomemexegive.pdf
    • http://sparan-art.ru/ckfinder/userfiles/files/vijawitulojixoselexi.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160c7770eb32d3---85331193854.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=back+of+the+cheque
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 16792 bytes
font_01_sfnt_off0000ffe5.bin
3d6a7dc526a0b05aadbf4379452b1261d8e4a746fc6d8f715c437b2a1f465afb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 10312 bytes
font_02_sfnt_off00011762.bin
f5dc1c1c2f9ec1f0b5339eed288aa818180fa96b84318d37e5f29eeac5ec8587
pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 16880 bytes
font_03_sfnt_off00014367.bin
5e4e1f196651c8b9d488671f70ffc2050e4da3af0c48d512fb167fbf68357bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x14367 16260 bytes