Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1c0c70d470fbf4…

MALICIOUS

PDF

148.5 KB Created: 2021-06-27 23:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5554fe74bf8d938845375956cfafaa51 SHA-1: 03b1f25645dfe675d68635cc12f9f7f4ad606455 SHA-256: 3e1c0c70d470fbf44796c415b1d7bfc5399f4cde88af8f3d3dac6eb6cf4bc9e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9226

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/d59380790c1ccaef803680450ab0435f/25269461815.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f8884831a---ridudeje.pdf
    • http://ggmtc.net/userfiles/files/12557387785.pdf
    • http://pantipplaza.com/userfiles/file/73814444930.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160a02eb187c94---dumabapel.pdf
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/10169867795.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b54856559b20553bbe16343a687051d5/gokogisuredemaxute.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/64973a5db6c2a09369fdc03075204e95/20492367104.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/ppl0n1k3utuc524pb95vjriqp0/guvovofuzazefakugar.pdf
    • http://changecn.net/ckupload/files/fotopazururumoteta.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b06aca4f232---44091116087.pdf
    • https://tootooair.com/FileData/ckfinder/files/20210623_DDC4EB6613E6953E.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccddd26044---81770459857.pdf
    • http://magendans.com/imagefiles/file/pipabikewoz.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/s00df2f4ugq4vcu2apso4otj69/14439836045.pdf
    • http://cjatkinson.com/userimages/36640763373.pdf
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/7edd35ba6972e191af2a95265e834cd0/tamenaki.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2d124ae7d540d8a6f3de96f9f9864266/57004709061.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6570c09c46---zejisalokimijolelu.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/psrto2segpthdu31edhmrfl4a4/kolevapolaboxap.pdf
    • https://abeess.com/userfiles/file/dipizujo.pdf
    • http://bitite.lv/media/txt/122/file/nawuliwolenumewugijuwi.pdf
    • https://aspaeng.com/files/image/files/dujak.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=mytv+super+apk+for+android+tv
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001011d.bin
4f487d98d762df5190a2e7ebb9257d837b9c66292648019d6658abf276898f96
pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 17636 bytes
font_01_sfnt_off00012f64.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F64 16092 bytes
font_02_sfnt_off000144a1.bin
5585d4856381d428957c38b40ec9940cc7eb6853d7c3cb2f9a1d34644c09bce3
pdf-font-stream PDF embedded font (sfnt) at offset 0x144A1 82152 bytes
font_03_sfnt_off000212b3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x212B3 16792 bytes
font_04_sfnt_off00022aca.bin
72a5336a3f31746244568c08f3c780893fb020953ae39929260452dd6975b95a
pdf-font-stream PDF embedded font (sfnt) at offset 0x22ACA 10812 bytes