Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eac194cc42f1acf…

MALICIOUS

PDF

91.2 KB Created: 2021-07-01 16:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd6f6e179aff89a8d432024b47bb0ca3 SHA-1: 0788c488bb56dba8f7932c78b00435170747f03b SHA-256: 9eac194cc42f1acfa43142a1ad3d5ab7fb977feebe6bd6cb0a6a4d168995b21a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://philabc.ru/uplcv?utm_term=open+pdf+in+autocad
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a5dd2c2cc---14466151910.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931b3b35a6d---votofegulutojozenu.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3f606f999---80338353048.pdf
    • http://1hozain.ru/files/userfiles/files/72212494884.pdf
    • https://cafe-malaysia.com/contents/file/16053403689.pdf
    • http://popnmusic.fr/userfiles/file/mefebazutab.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/fe32801790f917b2539b1079938c5f12/2653068835.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/ljff5uh7r9ksfcjgb2lf61mkk7/72218813344.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608200860f3f7---40840080467.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160799eb5c44ae---kibilenuxi.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca79141b8a---nipokoz.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/pu5vp0d4fkh15lh1ehcdf9kl7e/sajaxakixudubul.pdf
    • http://cuadepthanglong.com/images/ckeditor/files/16652877579.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a41cfee2b713863142c69f61ef966447/77906055831.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/uedarbk4v8ju78g8jc20u0i812/rusuwufelowagokukajiwe.pdf
    • http://elskenecologie.nl/files/fumafazosulabemusebepo.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fc4dac042---88578871141.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4abff2d23---79177101732.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/6d217d4d7ed68a9b01101ccbd2f5d18f/buxapisesone.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4ad25d891---10864510818.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xajarizufajukaxifekos.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/7eb3673edac45f92b0b56c9bbf402e10/kefimaxadikuzexo.pdf
    • http://www.asap-recruitment.net/upload/file/reworawuvurugodixe.pdf
    • http://kielcenoca.pl/files/file/bodokes.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076acb70724f---28073679859.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072ae8769ba2---gexujomedutobasurix.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baecc877a43---5116782629.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_off0000ffdf.bin
865f58d3856ae669241988694d7259f9c40824401e3be33128fa78e1c32b3772		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 18156 bytes
font_01_sfnt_off00012ffc.bin
7cd2643fbac9ced985dbcd77ad5a70c5817f15cad1cd2fa7bd62c1be59c13a81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFC 10424 bytes
font_02_sfnt_off000147c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x147C6 16792 bytes

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