Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b795e6ac5f242a…

MALICIOUS

PDF

88.1 KB Created: 2021-07-20 18:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c60774fb827181128cfd6cd75c2c846f SHA-1: 31807642f1d246248e4996e431e1e08329af6026 SHA-256: 03b795e6ac5f242a2f1693fec464b089534687e0df5838c3b3b7ad3b365edbbe
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://evpersoneli.net/ev-personeli/file/fovisudatomo.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0600afc16---52558682373.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/51506415304.pdf
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/3d6e1bd91c603f9288d7b5c9300c1052/wulisurofovovawekegefo.pdf
    • http://kadh.kr/bobod/upload/file/wizezosovalexubojobamo.pdf
    • https://pharmnet.cz/ckfiles/files/files/95440675766.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85c826023---botoneguzujato.pdf
    • http://al-bandak.com/userfiles/file/xotavegitug.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f14ee09e0f927882ab3e863d10a5e373/2764965983.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/8560fbf17cb5c897af922c466b464714/97744363150.pdf
    • https://angel-juicer.com/FileData/ckfinder/files/20210613_7063F8462F128142.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/bd3c316a367c821518d49932b227025f/xizekafusezasobewiwe.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f303ee12cac---guxipakizedodaligu.pdf
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/xudezediruxupetokelifoj.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/d85f28777100de4b36b3467b5bffd9f5/lilupaze.pdf
    • http://07-3739589.com/CKEdit/upload/files/xanen.pdf
    • http://kirilmazbardak.com/userfiles/file/48012219741.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/6d3601aedfccd68b445d6ea586c3cdb9/tavanodopexofinijasepuro.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eadb85975d---10056317164.pdf
    • https://argumentua.com/i/file/86259225461.pdf
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/igt3hokja19lorrvcnbcs6id52/sovazenunupukej.pdf
    • http://ahcxdq.com/uploads/file/022206335173.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/ga55c63d13ca1skistvc7u7ac4/66294770177.pdf
    • http://maekuangudomthara.com/ckfinder/userfiles/files/tuseragoredefuku.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=most+underweight+person+in+the+world
    • 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_off0000f63f.bin
701ae1a1678170d5cc9ff4d167860f87741e4fac65e9ef4efbeb7f10b702e7e3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 16972 bytes
font_01_sfnt_off000122b7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122B7 16792 bytes
font_02_sfnt_off00013ace.bin
72b6827e14290991b13e772f1e253a58f7024c396b506cfff11b6b3c93abe863
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ACE 10688 bytes