Malicious PDF — malware analysis report

Static analysis result for SHA-256 211d015991ab7020…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 22:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25f748c11dd3fa7b18b13f7df85b4b91 SHA-1: 56e6b43e9adabc65714581303ddc49b595eb09b1 SHA-256: 211d015991ab7020217ce43f9d526abb4e1ee4dc796f386019e7735bb6ef8094
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of PDF link farm heuristics further supports this, indicating an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609841b5e799c---wikok.pdf
    • http://seoulsquare.com/userfiles/file/revagoforarupetomurajufos.pdf
    • http://kpotplace.com/uploads/files/61765422385.pdf
    • http://willbramephotography.com/59006422980.pdf
    • http://bkdesign.ee/userfiles/file/jusowafidelenaxasi.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/ef544f7416c0b392ef3e1fa113a08651/41929634823.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aacde1cbffa---22747994127.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/9f25da2aec643163621ea798c8f5dbe6/kijovamuvi.pdf
    • http://www.jobsincrete.gr/images/_user_na/file/zifazopumi.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea9add5b50---xitedevu.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/abee0d2c6042eb0d2cf5f3f4aac891de/43948279877.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aa68b2a9229---86934128453.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/g9ibg125fnmutcn0tu62kat3r0/juzobovaza.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/076ab3a1d2cfb4bf4ab7bfa0f06a3492/xufivuwevarupovopeda.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa8541fb67---risagivefiviworo.pdf
    • http://inezorviskids.com/clients/37546/File/7704374501.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607816acbefd8---rimebomozowu.pdf
    • https://mygenius.ru/admin/ckfinder/userfiles/files/ripoge.pdf
    • http://cba60.com/clients/6/6c/6c2dd71b6188bc8e8f5adc6209c6f86c/File/27002615987.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090696749148---25273163200.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805c40111ed---86708777463.pdf
    • http://acecaalcoy.com/userfiles/file/sugerurunewiwotisubura.pdf
    • http://ibshop.gr/uploads/_uploads/files/wobesevalapurodizodababij.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160857e6673ece---nipetewedukijare.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=typhoid+blood+test+report+sample
    • 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_off0000ee37.bin
7bfdb3c0135df46dc98da1cddc3aaf10a70a311088e5297f9e7c0edbeafe80a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 10768 bytes
font_01_sfnt_off000106d0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106D0 16792 bytes
font_02_sfnt_off00011ee2.bin
7a80edd82c7700088733fa03ebb37b3db4ca686e6f5e440a67191a15fef7f41e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE2 17088 bytes