Malicious PDF — malware analysis report

Static analysis result for SHA-256 d224cdb8dce1dc37…

MALICIOUS

PDF

87.4 KB Created: 2021-06-28 00:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a05b711fe3303ab8f0a455f60037901 SHA-1: 4c0dc57b3ebbe8fc29db29e6f71f76a1e306b658 SHA-256: d224cdb8dce1dc37603c42e0bb0f4acee63d0cb80e2d7ef1102487e759d3d82a
156 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on compromised WordPress upload storage, directing users to potentially malicious PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d59c1630d---mimexenebamebujadazezena.pdf
    • http://dzwigipoznan.pl/userfiles/file/kikopajedabuvekudivola.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6948675445---jozumunetajepedug.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b7b5a478---66607016967.pdf
    • http://mu-rrrc.com/userfiles/file/53336164894.pdf
    • http://laweasy.kr/userfiles/file/jemivodamosixeko.pdf
    • https://computerzone.pk/file/84451351654.pdf
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/tevikiw.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ac7a80e4c---wolojeluxikopuvodona.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607009d5a54d8---norobojip.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b01f1e94e---bojapidukavovivuxap.pdf
    • http://shinies.ru/img/lib/file/74599589074.pdf
    • http://kopdesign.nl/userfiles/file/kabenepowasanovixevije.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b486acbd0b6---kixakixumedeludejezen.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b42fe8a5273---vuwufumu.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0b1bafddb---juzejoda.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/6804d7cb769d1a5d9d62435f612b5ce9/97520705333.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/d1af2ba9cd4fcd22c8c7d04c9d66f9f4/fokugiluvuzukez.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/58e17f6b2b0c47fdf0e510a8838e45d6/74489294069.pdf
    • http://ampletrekking.com/userfiles/file/43452412597.pdf
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/fivavufupowatunozenakuxiw.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce50b7dc809---zeril.pdf
    • http://charivne.info/images/file/9114413129.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=in+a+resolute+way+crossword+clue
    • 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_off0000f3ef.bin
95e6def7c0e49bc5d774fc1e5d9bc60a45b49d5876298db9675311756a3f6cae
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 17064 bytes
font_01_sfnt_off0001202b.bin
dd7ec52409c969f60d6ecb3192a4c7786e24a5f5604a9ebea19ade8d11fdd24a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1202B 10524 bytes
font_02_sfnt_off00013860.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13860 16792 bytes