Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f1f909002ec7a9…

MALICIOUS

PDF

174.9 KB Created: 2021-06-28 04:44:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 768dab697a3609cd3939ab68cfd308a8 SHA-1: 0ec066617c8d9e19da8fc16c7e4cb6b8ff710e45 SHA-256: e8f1f909002ec7a9d44fd9a62212f697de1409a1ad360cee6aa5c9e018427759
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce40d61b74---tujepewosidipazelavud.pdf
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/16l499dokkit3765lqf0dneut5/86492495052.pdf
    • http://jr-bang.com/uploadfiles/20210621022030.pdf
    • http://tipsclubcr.com/campannas/file/rupimelepupovevariluza.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160991d1d9633b---zogimisuroselizeked.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609037c30f5fb---wizaribunugelolij.pdf
    • https://grandhotelbulgaria.com/userfiles/file/57416215635.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/cc6989da08be1808b9bfdb1e17596659/vixoju.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c9407522b9a---71829015386.pdf
    • http://xn--80aafbanafwvcftiqfecrg2a.xn--p1ai/pict/file/26268411324.pdf
    • http://apogeeconsultancy.com/upload/files/43062273082.pdf
    • http://sunjewelsonline.com/userfiles/file/kugizaxovuzegafetuxonur.pdf
    • https://champion-osk.pl/userfiles/file/10362250579.pdf
    • https://adasms.fr/userfiles/file/teledixenatudifikolog.pdf
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/0d1262d9af50449cfc4141029b0c04d6/vojedisubugesobewi.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b860400e4---nidojasaxexexugi.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7b99d440c---guleraxaditimorefejide.pdf
    • https://szabobuszrendeles.hu/files/files/39749829859.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff18b8c4c5---tisibivosa.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718f8678bcf---vorujotononopiwakike.pdf
    • http://dagmar-e.de/userfiles/file/jideg.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/32c2ead9380a502ce33b1d15fbdf83d9/81526030447.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074026d1038f---bukijolebalif.pdf
    • https://commonwealthsportsawards.com/userfiles/file/16154082768.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d059611fea4fba88043014dde84216a0/xokopujefizovada.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=horse+carcass+removal+near+me
    • 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_off00024c96.bin
c6fa337e97e4c4f606abcaa8349375da1eaf4828fbdf6d9cfdf4aea1f2266960
pdf-font-stream PDF embedded font (sfnt) at offset 0x24C96 10256 bytes
font_01_sfnt_off000263a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x263A4 16792 bytes
font_02_sfnt_off00027bb6.bin
0c6a1317c0433885fb70d83d577ed69f0927d3ab6b289a608f16ae04b3626e31
pdf-font-stream PDF embedded font (sfnt) at offset 0x27BB6 18772 bytes