Malicious PDF — malware analysis report

Static analysis result for SHA-256 46629840303f4a8c…

MALICIOUS

PDF

85.1 KB Created: 2021-06-30 21:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91ccab2dfb2ad38f8758bef944319a3f SHA-1: be6a04517962ba440e8afb9cc9910d7e202cd7f0 SHA-256: 46629840303f4a8cb869d8ec7922d4a00883e6f796b2fa27c90c5583b77bad7d
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised sites, acting as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/05e6ba97b646d552815858285ed889f6/32081732189.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7146aedfb9---46275631091.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094754f50c01---31065702909.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b56acd1fb---5989973997.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/6f2a14d82bcc72873a1f3ed13bfb2886/39661686871.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dbb27ea68---33900843550.pdf
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b4a78f2e359---garoruvutipazosijadigap.pdf
    • https://noddy.nu/images/file/motanapudosilalododexu.pdf
    • http://yves-segers.be/userfiles/files/delot.pdf
    • http://dalnoboy.org/data/filestorage/upload/files/8483828415.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/977d4287f3bc11e034bb5b48131712cc/gadepiruvikilasa.pdf
    • https://atlastoursntravels.com/userfiles/file/saxofu.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69fd792036---powavafolelugetodepekis.pdf
    • https://abofahed.com/userfiles/file/16092146507.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160c095d6824be---resoladixipazorojamo.pdf
    • http://avonsteel.com/UserFiles/file/73038372125.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160753ab288474---21012496543.pdf
    • http://turnyras.lt/Files/file/gugidagedalanufowiwig.pdf
    • http://ankamet.com/userfiles/file/fifafivel.pdf
    • https://menu2uplus.com/images/file/vuxokofiwuneduzuxoxivug.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c2ba812d7f5c3b4b73778a824acf779e/2541153545.pdf
    • http://aaaexpressheating.com/userfiles/file/3350027265.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/54320fb442af3dfb08f9b693576a59d1/kofam.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+convert+pdf+to+dwg+in+autocad+2014
    • 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_off0000e6f7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 16792 bytes
font_01_sfnt_off0000ff09.bin
67f62e6a3a570c8892f04fc6c299d7273120b9cff8c5815c2d62483f3fefc55f
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 17620 bytes
font_02_sfnt_off00012cae.bin
e055ddc5a388488ad5b07166d52ef80b02c1e02a1c975c9c24f564c712fcc942
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAE 11196 bytes