Malicious PDF — malware analysis report

Static analysis result for SHA-256 367848914c3f2961…

MALICIOUS

PDF

77.9 KB Created: 2021-09-16 03:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 119260c05658a52911e8ca642f570ab7 SHA-1: 4227bcd615c448a7e06103b26b1349a5465344be SHA-256: 367848914c3f2961ff8271cbe93c632d2fba93b77ded3a82ed5f88c686fdc4a8
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs and link farm patterns, suggesting it's designed to redirect users to potentially harmful websites. The presence of a 'download button' heuristic further supports a lure-based attack. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://wastran.ru/uplcv?utm_term=facetune+2+free+ios
    • https://ferropula.hr/files/jitazilo.pdf
    • http://studiolaviano.it/userfiles/files/xufovowux.pdf
    • http://maulich.vn/attachment/files/64544934438.pdf
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/nilekiriwavusizonu.pdf
    • https://liantoong.com/archive/upload/files/85045769766.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e7a58b805---58608819207.pdf
    • http://starinviter.com/ckimagefiles/takuzarebilemukasugun.pdf
    • http://3colorjazz.com/fckeditor/userfiles/image/30003524247.pdf
    • http://rayhovietnam.vn/upload/files/51497386306.pdf
    • http://dralituncer.com/userfiles/file/likobizazifurobisuwem.pdf
    • http://tuanayapim.com/rsm/files/59990387980.pdf
    • http://gemculture.com/userfiles/file/zimasijumodajalekitunaxok.pdf
    • https://gesema.com/UserFiles/file/42265214000.pdf
    • https://kingdomdatesuae.com/userfiles/files/towazonirazago.pdf
    • http://6nergy.fr/6nergy/sites/default/user/file/rurulazixotexiri.pdf
    • https://apteka-wratislavia.pl/halatecza/userfiles/file/14298594072.pdf
    • http://vnos.vn/app/webroot/uploads/files/44655238825.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138e05d0828a---35880845809.pdf
    • http://bsa-billiard.by/images_from_html_editor/file/gebetijopuxepuzufupa.pdf
    • http://ty-int.com/files/files/85511390947.pdf
    • https://0924055971.com/uploads/files/202109080721535406.pdf
    • http://goldenstarhotel.vn/images/uploads/files/lujowekasuseresenojuvaj.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612efa1405506---79007018553.pdf
    • http://cmtl.in/uploads/userfiles/file/file/31642217965.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_off0000ca2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2B 16792 bytes
font_01_sfnt_off0000e23d.bin
2d39bd79d291de72922cfc583f808383dd13f5fe5c2c11ebe65ef1c4b438d99a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23D 18516 bytes
font_02_sfnt_off00011246.bin
4335fabcb894e39ae4d83ae3bc60a1de7fa0e351085381254a184b556bd12c17
pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 10480 bytes