Malicious PDF — malware analysis report

Static analysis result for SHA-256 495de311c31fa22d…

MALICIOUS

PDF

88.8 KB Created: 2021-07-02 23:25:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a56086052ac224a510bcc67f7e8d4326 SHA-1: 1851de39c58388982aee7eb689a601cb0e407b17 SHA-256: 495de311c31fa22d0deeaefd5459872fc2e96e9cbd108f6b1b7f8c4d2d93bb41
196 Risk Score

Malware Insights

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

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links, many pointing to compromised WordPress sites, designed to lure victims into downloading further malicious content. The document body is heavily obfuscated, preventing a detailed analysis of its specific lure, but the overall structure and linked URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/64f062a3b18be27e9fe7347519e98f7b/zixobelitudarudefawa.pdf
    • https://fid-data.fr/app/webroot/uploaderfiles/41550995163.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/cvt5hkqpho2uuuau61hf0pis61/sizonagaxugetita.pdf
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/737a854e89677dbd2f658f30dca94766/paneva.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/866a832e7dd1f872c3ff702aa8f1dab8/27313679560.pdf
    • http://www.aluvascientific.com/UserFiles/file/74080147121.pdf
    • http://biometria.pl/photos_fck/file/rusigejujuginegu.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/oio5tdm1k09guurb5855clmhe1/vikesolib.pdf
    • http://boek.se/bilder_umeny/File/54808118661.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608193e03dfbe---rigimanojid.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecde78bc26---77510520115.pdf
    • http://rspon.pl/images/wyswig_images/file/jepikepomexuvevilaxego.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/6a1b3ea017c1747654e5863ae39b769c/61835146908.pdf
    • http://accessiblevehicleservices.com/userfiles/file/basov.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/06804503ccbf53fdf0ed2321c2245f4a/67893234014.pdf
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cec4b3581e3---15711372840.pdf
    • http://colorfulmedia.de/fotki/fotki/file/nujedajikafelasizofenol.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/d6013c7cc026a701848dfa19c8348aa3/50492236920.pdf
    • https://elnativocoffee.com/silver/upload/files/ridiz.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609de5e1aa739---57610001778.pdf
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/41c7cf7b6afdfe3956f04c31624cbb49/ramevekojivaxanaf.pdf
    • http://toyotarent.kr/FileData/ckfinder/files/20210528_511742A1F17FC095.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c654d302cb598a28e82081b1dc2c678e/788368592.pdf
    • http://ahkjt.com/upfile/file/30667422527.pdf
    • http://uspeh-kursk.ru/ckfinder/userfiles/files/44419915232.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/925f2f05e6e324273b7cce0670b4b97f/batizixome.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=%24300+charity+deduction
    • 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_off0000f733.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF733 16792 bytes
font_01_sfnt_off00010f45.bin
fb671468799cae0cbc65c66883de7505b64f603cca584c6195283cb4d8a06b63
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F45 17360 bytes
font_02_sfnt_off00013cc1.bin
0310c26b39bf03ef8e92bf4ef7257700986a8ec6543ea4f6ddc90466c3e8d38a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC1 10872 bytes