Malicious PDF — malware analysis report

Static analysis result for SHA-256 00175e5934c0d8d8…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 11:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12512ae4ddcb6f366d3649f721370fba SHA-1: 16f40ee440cfea8a6e72b35b280a6ca00e8ae146 SHA-256: 00175e5934c0d8d82ad5949aaa0c6542a14ba077eec59370a8a7509994c09765
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm, with many URLs pointing to external sites, some hosted on compromised WordPress uploads. ClamAV detected this as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The primary function appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c773fe7399---68318372816.pdf
    • https://adasms.fr/userfiles/file/59435661393.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/7vo4n1d4v41ol5886q3amuq3g8/manetodimuligeboxivuzesoj.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/dai5j8quufhjn1mk7ljsft5772/19326062251.pdf
    • https://augsburger-dartliga.de/uploads/file/58274769453.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/hb55cdqn7qci96n9el2rcpasub/81185565227.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ebee3561ce1fbdac7d49cf0181c62435/24096672177.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607681bf57c96---72696751575.pdf
    • http://studioturina.com/userfiles/files/nuleveka.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/5bd9f4a86afb6b850ebbbf7c03b38911/kisovogeviginedilaxulu.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/162dfbbbbe9f23f6e8d283f5213f18c5/vokilujodejikak.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/luh9pqtms4a0lgipbv76u4ha2l/81171149288.pdf
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/qb1foffa28ohmhu790lenst9fv/43710363796.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/26f4b5042ded083dc4da5327f7d1afe3/pisetokusadedejobut.pdf
    • http://thestarbusan.net/FileData/ckfinder/files/20210614_A2508AFC14F965F7.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bed6f26fd4---ropigimufuxavet.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160b49cba967a7---38086641349.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/1ea2c44fd3504739ce3152831d61b913/delojo.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/e512ed221b8ce77823bcce5b667fcd1c/didefegidedavetepevo.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af7bd89e10b---17803025574.pdf
    • http://hubbardfamilycircle.com/clients/62940/File/rerijaj.pdf
    • https://bititechnika.com/uploads/file/28843267488.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d2225355bff---75244523901.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5ebc1cbd---18661072093.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=dry+mouth+in+summer
    • 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_off0000ecd4.bin
51c4536ccece28f962b22a77e7ccda15bc5d98ff12d0d660685f3f6c7cc6d7d0
pdf-font-stream PDF embedded font (sfnt) at offset 0xECD4 10380 bytes
font_01_sfnt_off0001042d.bin
debb55291229c8dfb11e0269402d0e53699f4c5a95572979bbc619a2d30f0d70
pdf-font-stream PDF embedded font (sfnt) at offset 0x1042D 17056 bytes
font_02_sfnt_off0001308b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1308B 16792 bytes