Malicious PDF — malware analysis report

Static analysis result for SHA-256 be934dc9b4fc9a0d…

MALICIOUS

PDF

78.8 KB Created: 2021-06-27 19:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a4db84429a05c9aba395c6409e0bae3 SHA-1: 92f4768e2c2b027bd3df460506d9ff3e40dae96d SHA-256: be934dc9b4fc9a0d816b027b09aae20889669dde2b47fc76f2fabced1bc1c9a5
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised CMS upload directories. The presence of these links suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://absolutelyneon.com/userfiles/file/97195297762.pdf
    • http://safarang.com/basefile/files/31260540453.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071961cb2638---76490329792.pdf
    • http://akinmedical.com/uploads/file/97214905313.pdf
    • http://wrtour.com/FileData/ckfinder/files/20210612_1171081416447035.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077e5593ac0a---58498329550.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cb168f56c63---57682632710.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/97206fe244c693ec719c6dcc84d0af16/tufevudo.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5ac8a76d9dfbffc9a25210fccc10a925/31394874623.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086fc844be49---11367204368.pdf
    • http://cc-loges.com/uploads/file/jomemininuwipixofuxeg.pdf
    • http://collegium-connect.nl/ckupload/files/50481717245.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaf0a0c525---tupubazedezigoxutef.pdf
    • http://www.fashiongale.ro/userfiles/files/sexulekapazuluzupije.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7271b892f1---42981726097.pdf
    • http://dom-2000.ru/ckfinder/userfiles/files/wadiferekojeko.pdf
    • http://blankheich.de/images/uploads/file/61098105231.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/iurp5503cgkaipcmpt36536peb/sonas.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42a624a572---zukoge.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/18c5de882dffac70e51b5f33e7fbe8de/piroluxorige.pdf
    • http://3xlove.com/uploadfile/file/xapoxexatokiwasulodu.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/1s3k3m4sv7fk7o2k1th0takma5/45311154669.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/8717ia7k3q85n1pn60d6p7biuc/wovakawaribog.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ad3186be0---51137797362.pdf
    • http://chinalanpa.com/images/upload/File/tafevusebumavosumere.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=abdominal+pain+after+pooping
    • 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_off0000d5a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A7 16792 bytes
font_01_sfnt_off0000edbe.bin
4d19179869a6ad1f438ed9e62d955fe00240813abcbda4dbdc88ef50b98c57bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 10792 bytes
font_02_sfnt_off00010616.bin
e018a4744fae829cf8c20c74f28974177e019659068d64e647da8bbea5620117
pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 15624 bytes