Malicious PDF — malware analysis report

Static analysis result for SHA-256 3098a0f310a1ffd3…

MALICIOUS

PDF

86.9 KB Created: 2021-06-27 01:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a7770b94eb97f4bc668351707681687 SHA-1: 3dfe0207f7e6f7c24c839704c0696b78136935a2 SHA-256: 3098a0f310a1ffd36460aafd81f8a5e634cd7896570c863a11cc860d39ed8ef7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b062e2f75d---pedilimulegipebugifop.pdf
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba68e8412bc---sazirinukem.pdf
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/xiruwezop.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbae32a8b34---nokagodukijuluzuxuxazuz.pdf
    • https://apotekatia.ba/fajlovi/28955365903.pdf
    • http://nowyhotelik.pl/userfiles/file/17680074968.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160d08a5a7b290---kixokubovod.pdf
    • http://vervesimuhub.com/userfiles/file/notomorudasamuvoxupa.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7d0c17761---65652723545.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/tq751ndkadbphagfvo4jg61t5t/79880362167.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2f4080b33---gubunoropel.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/7c0608a7a3ad7521b969c97bfe238443/xewubib.pdf
    • https://ayurvedaemart.com/uploads/file/33611823177.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8e23d959a---ropadobezajazi.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/81602618683.pdf
    • http://nandeestationery.com/userfiles/files/xefub.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c102c242d7---684236844.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bbf329ab71---botiturasor.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/99e6ef37b25d0b0c29f4da72be90873f/5731915770.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/24face5b67552a697d4c595d7f863110/noponuzoxuram.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607234b3cef09---nixulam.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/b1a777dcba5c5bb24dbec562286b1d67/86209759870.pdf
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/dizajetaw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=8+ball+online+play
    • 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_off0000f28b.bin
f7d4ac1b3ab371603bf4979fb3e661f65cd86169d839cecfead5f4b593450bc8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 17880 bytes
font_01_sfnt_off00011f9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9F 16792 bytes
font_02_sfnt_off000137b6.bin
29bcfc28d7830f11397d1c54bdb0fdb91a59b81535e0b237ec8410f3a2f8173a
pdf-font-stream PDF embedded font (sfnt) at offset 0x137B6 10244 bytes