Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7a5e88b317683aa…

MALICIOUS

PDF

86.1 KB Created: 2021-07-01 15:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b65145dbbf5a4f728eb7ca859dc8c3ba SHA-1: 1751a9b9f497f63d5c970d6b2b4a945cd588267a SHA-256: c7a5e88b317683aaed04d26912158d4892a2fea1e3f9fd75bb6498efecab68a2
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing-related content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ash-graphy.com/userfiles/file/fiziganajiziwo.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d9d5fac482---vijelamulutovixolevamipun.pdf
    • http://mywayrtk.info/userfiles/file/pimofawitago.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/6dbe558ac372ff8009ad83c3e3753a9f/gudiripono.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9dc2a2bea---besumiwafaku.pdf
    • https://cape-electronics.com/media/file/79674612675.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9c7196ce3---tufigawagujimu.pdf
    • http://bronia.org/userfiles/file/19418609210.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/fcd56f458062bf2ef841a1f35c6b38c2/tavixepegobizol.pdf
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/5528958123.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/7751rp532ltk02bh31lsstnikl/xagivavekizarateg.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/bb6e9bdd2c4f89d2424e1e39e5e420e6/3672518523.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f66ef0850a---2594211613.pdf
    • https://akproauto.com/nbloom/fckuploads/file/vugegixivijaj.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0e3c64570594447c092694d4b19cc0dc/12220404880.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/cb5f7ceb59e68fb71df1bc34233344c9/63535862293.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16087d983621be---17993231877.pdf
    • http://3dtechgroup.com/uploads/image/files/dagekakebuwudawavi.pdf
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/32361567630.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/d0d9a71ef4370875c50b81cc7d543e48/puzewapigemadapoxibaxin.pdf
    • http://salkim.com/userfiles/file/bazutexokoti.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lc662mrrph7anoha6pic72lees/zoguliv.pdf
    • http://bagumul.com/file_upload/spaw_upload/file/20210518194429.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd64c9dcb1---gutonixenukavax.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=administrative+justice+act+3+of+2000
    • 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_off0000eb79.bin
9c408e3040768bfc8b111b70e0ae0e55168ea680195d541a25011790784b2218
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB79 11280 bytes
font_01_sfnt_off00010608.bin
e78607389169ef01463060e42d746bdbfdb4ac2916a40a52afc241fdf381b27b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 17108 bytes
font_02_sfnt_off000132f1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132F1 16792 bytes