Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea60349f073ce47…

MALICIOUS

PDF

102.9 KB Created: 2021-07-04 09:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a41f15e52c7e906d55cbc34f1eb4c8e SHA-1: 612967396652d2bcf96c77dae7b3a455153e9f0f SHA-256: bea60349f073ce4706969f82f4f6d40f338094e5750bb45a4805f1caccb63e0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content or phishing sites. The presence of multiple distinct hosts and the use of disposable hosting further support a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/0c0b193fd06a0b9b6e1ac80362916a0a/papad.pdf
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/6349bddfad994aebd607d7f401738745/96896138466.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be43d7c5f5f---lakowolawazadugu.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/02ea78acf894c110a57a071fb2e337c3/vosinurukuk.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075cae066dbf---xadotaw.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608621fb32fbc---56816805572.pdf
    • http://sushimura1.com/uploads/files/69248270543.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f96de7be7---18327541073.pdf
    • http://cn-noah.com/uploadfile/file/60178332305.pdf
    • https://idd.no/ckfinder/userfiles/files/ribabiputaf.pdf
    • http://strefa-fitness.pl//fckeditor/editor/filemanager/connectors/phpplikifile/kumodilakekerividogikobod.pdf
    • http://goksirkrupskimlyn.pl/img/upload/files/nikukebogonefetoturezivu.pdf
    • https://autoradiator.mn/uploads/ckfinder/files/befafuxa.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99df9d97d4---bimiganakoje.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/mvtie96cirglgtjdg4chuf9eip/87070593382.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608199e3ce96a---pakadisexita.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/da4afd0b1411689aad91dca02a7b9976/11764277821.pdf
    • http://zuche0551.com/upload/file/36562619577.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/t2snfdc5jtd5vs6pspclhjls4p/26997189383.pdf
    • https://namratalakhotia.com/userfiles/files/menamurixiwix.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcfc5263b3---38481808719.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/6dbeihtau4517r0l17jqjqjl0t/54663732840.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/24590219867.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/33baf95881e1d87fcbb9f07111edc2a1/56545346524.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/5cvorghqhcb1euluj5skgcrj30/tuxudolasijuwefejekeram.pdf
    • http://englishkan.net/UserFiles/File/lepamikisebulagupe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=most+reliable+four+wheeler
    • 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_off00012f28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F28 16792 bytes
font_01_sfnt_off0001473f.bin
3f5ccae46ee3df50a562f9ded056e6ac0048ec09bb9e488032b1bc026efa5b5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1473F 10528 bytes
font_02_sfnt_off00015f72.bin
fdb050bf8661e552c1db8559d30a646800b4dc49590472f665d5d2f8800bcad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F72 17920 bytes

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