Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d703c8105e64725…

MALICIOUS

PDF

61.3 KB Created: 2021-05-30 07:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b73d91c741d7d8ef6053a0219432d70 SHA-1: 03a358b9b651d76dcec99a362740d7cddc35f672 SHA-256: 2d703c8105e647254797f3ae48501de36f9875257604938c8efd145fcb4d1387
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which appear to be compromised WordPress installations used for hosting malicious files. The presence of a link farm and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are consistent with a malicious document designed to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9533

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=pokemon+ultra+moon+gba+hack+download
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/55e7400e6d0dc33418f5625a9bc9bf85/72048868033.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc00d002e9---38768312787.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1a3ed082b---xutefarotakujodixus.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/cb9a8bdcdb12d58661e53a3aad53f0d6/pezef.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160775d8ec2bbb---lirixejawomir.pdf
    • http://alphasigmaoverseas.com/userfiles/file/76060076771.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/8ccf8275ad46062fa7fcf67095699689/41016515513.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea06992531---kosasajoropalid.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/9145478828.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/fve37h4i4ccrcou1sodqjk34lm/5416718195.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b578d10695---24121524238.pdf
    • http://bliksis.ru/userfiles/file/93833713680.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e7cf5daee---pekinubezelojajolapujijux.pdf
    • https://dienlanhbachkhoa.info/upload/files/subowut.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/pa64ms61b56gbvrqj5hadmr255/xaxatefunowoj.pdf
    • https://sieompaysdebray.fr/lesiom/txt/imgadmin/file/powanowasivumafaroleje.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96bc71b4f---kovaserivip.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608452f9acd85---murowepe.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/86ea96b56d764453821358cb7f5cdba8/69141564952.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/c5b2478e54d2120087b4d792b7fc0ae8/bojuliresube.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db02.bin
e526f286b609cb2b023646f81e307a719cfe2173581b0d3964c7b6628b109a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB02 5304 bytes

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