Malicious PDF — malware analysis report

Static analysis result for SHA-256 76feaeee9b685103…

MALICIOUS

PDF

83.4 KB Created: 2021-07-06 19:04:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3620a0312361159ad9287f2e2e662a26 SHA-1: d93ee11f02264796b1e4204a47e9431747c69c61 SHA-256: 76feaeee9b685103824348a610bf56743b07a6029506c04a62c7ac99ce9e40ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating it is a phishing trojan. It contains numerous links to compromised WordPress sites, suggesting it is designed to host and distribute malicious payloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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 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://crysiq.ru/uplcv?utm_term=present+simple+and+present+continuous+worksheets+with+answers
    • https://mimpiindah2.com/contents//files/xirisetujemogu.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/34b1e6d5c5c7e021e6a5711e008e738e/xijipovinefev.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/95e54c3c08370627ddb7c59c982f8a0c/94057366076.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7af900619---79509447138.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607dff0c5c57e---kepofamokuvigur.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608263609edd7---10904258598.pdf
    • http://famillespourstarlight.ca/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/84071767640.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5a6574ac6---70726892481.pdf
    • https://alianzatours.com/imagenes/file/voxaz.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960e0928b2c---limeg.pdf
    • http://interel-rus.ru/test/sites/default/files/file/tewope.pdf
    • http://health-bridge.in/upload/file/befisigurididi.pdf
    • http://skiflogistics.ru/userfiles/file/29948796346.pdf
    • https://standsimulator.com/ckfinder/userfiles/files/pawalogifevefubinodipuj.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/9c926677f2a4b21033a2427b7c684239/14445461746.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/66a7f8dc59f934eed14b56ca4e4e0f18/lutara.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/laobcrtgg3dt0sjfddktvb1ia2/79765335885.pdf
    • http://acmemask.com/upfiles/editor/files/51109366661.pdf
    • https://firsatoyun.com/calisma2/files/uploads/nepulib.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160850630db695---sisugogixiwejowik.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca573c13f5---71364690725.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/2dvce85elaq8cpu7t4tsv0ttr7/66954436780.pdf
    • https://digitaldaya.com/imagenes/file/putumulelomabofuvuded.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/350cpninm5n7nr2o9qonld8kj3/foxinuvugofo.pdf
    • http://kup-vino.cz/web/ckfinder/userfiles/files/24185004508.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_off0000df64.bin
b631913239b188f0dd195c0af454bec9b35321b44906053c28aed571fd8c7dc0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF64 11060 bytes
font_01_sfnt_off0000f904.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF904 16792 bytes
font_02_sfnt_off00011116.bin
03fbc3cf4554a1a7e7ca0bb926d3c708163fc7c9d8765bb795206000e4272016
pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 17344 bytes