Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c41d7fad096a8d…

MALICIOUS

PDF

87.6 KB Created: 2021-06-28 17:23:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: a49dd57faa5faa11fe806ac1f79e88af SHA-1: 96036f539bfb2a4dfebdce313825293917175614 SHA-256: 80c41d7fad096a8d6421ba6f7c9e7c023e8c089e1dbc6b362b2d8e0454130bb1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristics and URLs suggest a tactic of redirecting users through a series of links to obscure the final destination.

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 http://daiichibus.vn/uploads/news_file/50574114671.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e517e36d02---71571046269.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/5bqsrjlsqiftt4b20f7965eck0/nudiwudifaduranekel.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714aed735cc---87374746094.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083fe2ef2396---xijug.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5c315fa29643c999a235407699a2389e/vezawuraxugoxis.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/pudivifimumomekuxij.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160779d7202190---75484897551.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/foxefetid.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aaec595135---xadajazuxegijowebexe.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///84371154088.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/jajitedugavi.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///19204354863.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc5d311fb7---89281379798.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6e606dc2028657253f6a58a1f822db9f/jenurelebag.pdfIn PDF document text
    • https://tonitomov.com/picture/file/14155851111.pdfIn PDF document text
    • http://goref.ru/files/file/modapas.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0be077269---10894587055.pdfIn PDF document text
    • http://kapsalonindex.nl/images/uploads/bemidaxaganejiw.pdfIn PDF document text
    • https://hostingalani.com/calisma2/files/uploads/sotasoveveziribinotabep.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/aafcf5689da3f1106890505a1625996d/79708428879.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/5a4c10faaa0e5a89cabdcaa6a5b32908/rugaleme.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/22188cf09f363717c9a0d43bb5babb6d/65800313247.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/22gbdof8ipi9305vhdm1bn2j76/wewowu.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/6166054071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=compulsive+reader+meaningPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 10832 bytes
SHA-256: d3e4f9a6b68c6b350c294571009dea29a02266f951e589816a585e61965848c7
font_01_sfnt_off00010b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B92 17604 bytes
SHA-256: 697b7d174a7107d5fff490cb167024abb2db91e9734bf5539b01549273f21ace
font_02_sfnt_off00013949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13949 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.