Malicious PDF — malware analysis report

Static analysis result for SHA-256 112b03a89513b210…

MALICIOUS

PDF

89.5 KB Created: 2021-06-17 05:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84d8ea1f3865739eb64021f9b5b1e5bf SHA-1: 7cc9c47bb783ce66f64f67e628bb276e50e44f51 SHA-256: 112b03a89513b2106efcac65e2476b1560fe465f88d05a92871eeac3605492b7
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised websites, disguised as a movie download lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading a secondary payload. The presence of external URIs and link farms on compromised CMS uploads suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=agent+sai+srinivasa+athreya+full+movie
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/ab3802e1e6abc72a68bf2e993fe7870d/95766248083.pdf
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/abb8466912472b604d061a3119ce9426/sixafokabag.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c65fbd34569---41465948377.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fb507de81---tilerusagimarub.pdf
    • http://sacoorhealth.pt/site/upload/file/67496765737.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/85024b8973a22de6f5bbd76d89f2b7d6/sevufowalatagopolikil.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c944fd2974c---zixijilimoba.pdf
    • http://randalljroutson.com/clients/44711/File/61126530194.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/28e143f063fc4bb1123230b88f2a97a3/xesejusorexemipunolubawo.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/8b3fac11d518c5e4fe1835c9a952facb/27177587716.pdf
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/41267726171.pdf
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/1ea844d7b6b9e7dcc822a0faf1c27266/ruvixarope.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/db2a3ff6ae145cd02b197a0754923caa/68776581133.pdf
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/lv803qetvj3n7mb5c2gij1gl0o/roxavuzene.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607140a1dd182---38707319602.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • 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://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3da.bin
a163a384e3d6b96d18a60a6c03ffc1734216602e0ea1420a3f1a6c9c2865c24a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DA 5332 bytes
font_01_sfnt_off000105ea.bin
776ee9fc45438163cdb53c841df86929399c96c1b2ab1966545859fa54033cbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105EA 6508 bytes
font_02_sfnt_off00011af9.bin
3d236a29b6b3bb2b1194303a78cc3986abde2ab0c20285c8e1282593372ccaf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF9 12176 bytes
font_03_sfnt_off00014328.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14328 16164 bytes

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