Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dcd587d8c70647…

MALICIOUS

PDF

82.7 KB Created: 2021-07-06 22:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bb9e85f280061d62604a8d4954f28a3 SHA-1: 85791dbf403359b3c65ad53541a32a003aec41d0 SHA-256: 96dcd587d8c70647ee65b0d701ea372af68350e8c26b9389c27acc019c58e24e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple compromised CMS upload storage locations, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous external URIs and link farm heuristics indicates a deliberate effort to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/3b771edb4a28c716927b9001beec8cce/tesatapiwevemogenexesox.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/nap8b0o9vq70svmpkh9rmvne70/zokazog.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/a49e59184d424b4feed5406b8807d477/fonogilefi.pdf
    • http://studio5r.com/userfiles/files/39976340702.pdf
    • http://comp-art.ru/userfiles/file/65314665073.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a14a415dc19---tidivajatemojiz.pdf
    • https://dubaimotorcycletours.com/uploaded_images/files/92369916416.pdf
    • http://dailymaytrogiang.com/userfiles/files/kozuziruneratokixevase.pdf
    • https://autosaloncenter.com/uploads/file/resogulotivupo.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fdce6b6a5---98922409744.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/940846o3d133umfmreboo29une/laruto.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d8ae8932a---pevepelof.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa56d24d50---dubugodusoxozidirubakej.pdf
    • http://angarakshaksecurity.com/userfiles/file/neresefekubomupibo.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16098536908d40---77513619190.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacbadb42a---36154950126.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609671b747fbf---67667807358.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/0qcq7h0qsv8vhi36nusksbs0r2/bazevubutek.pdf
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/63d17bc704aa2f64a5fb9afda461cb2b/13404051572.pdf
    • http://finemetal-cn.com/upload/files/meneniwudasoxetuxol.pdf
    • http://stolizstekla.ru/userfiles/file/59387423422.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/q2acbairqmbhesfo6nbvkd3gh6/70381167813.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/fa0cb2986e311a58a2c11e0cc29a5e1c/wuwutawigiwinu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=numeric+letters+in+english
    • 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_off0000e1ac.bin
c8bae7fab51344419534c4c7cfd6049de8d53196a7fbc917f854b9efdf88b6f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AC 10472 bytes
font_01_sfnt_off0000f93d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF93D 16792 bytes
font_02_sfnt_off0001114f.bin
d998df41c2b038421bdb5f8996b2edb3314d45358637e3ae5924b7677a8d1a15
pdf-font-stream PDF embedded font (sfnt) at offset 0x1114F 17024 bytes