Malicious PDF — malware analysis report

Static analysis result for SHA-256 201ef381cd949c7a…

MALICIOUS

PDF

90.5 KB Created: 2021-07-07 00:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e82b379b6465760042923e7d1357cd0 SHA-1: a5e4ebd4efcb2c3ce2d9bd9c6252bd636b753e61 SHA-256: 201ef381cd949c7a2fa0666b67802c6afd48b6bc5d2ba48ec06591d1d523ec57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress installations or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://crysiq.ru/uplcv?utm_term=justice+in+the+bible
    • https://go2germany.ru/files/file/14742044776.pdf
    • http://bogelaipigeon.com/upload/file/wapuratilinutom.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/26628847078.pdf
    • http://yaqeen-eg.com/userfiles/file/43631034716.pdf
    • https://glbtrader.com/userfiles/file/42664006926.pdf
    • https://ovalpolycoats.com/media/62190678989.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5122474440d2196298ebb6d163e292e3/7893722242.pdf
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/717199b917d0765321f3794e47308eb6/21305156765.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a062149cfd4---silasubirupozukixofu.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733d585e8d4---tidulewevuxepetuxun.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b304fc21235---zilafarapi.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911a4a712d9---gujasitaninororu.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/abvt73hmiuh6ucecosg6j0stmn/nolunajatiduzij.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080dc5dac9c1---mopizojizefujimiduloda.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/3fb7accedcaf4c1c1493bf91f77d4415/47480070596.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82c1138d4d---58484830638.pdf
    • http://harryreichert.de/uploaded_pics/News/file/24428814329.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/4c5a5a67cb5bd09cd7c0aa1da6315281/xoponelelosujaki.pdf
    • https://questyme.com/userfiles/file/vosotaduminuj.pdf
    • http://greenbiotech.vn/uploads/userfiles/file/32365390360.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/k30ahc1b1rf503e4rbgjnqk51u/69705872115.pdf
    • http://crabber81reunion.com/clients/b/b6/b60cf3d631ff247311937b5f15bedc89/File/fomule.pdf
    • https://xo-sound.ru/userfiles/file/75447743618.pdf
    • http://cycling-software.com/files/file/nodonukilozexaraxopijez.pdf
    • 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_off0001015d.bin
c0bc74d03c9a372e277623ae74750b9cd7d9f0ddbced0fccc474fce47748fcdc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 16684 bytes
font_01_sfnt_off00012cc0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC0 16792 bytes
font_02_sfnt_off000144d7.bin
38242d2feacdd4d00afb6cb1a27c804c8aeead580757247ec755d9e67a66e2cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x144D7 10176 bytes