Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1446aacd759b176…

MALICIOUS

PDF

82.3 KB Created: 2021-09-20 22:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 39d96fc0c796455674f79a6df73dffe3 SHA-1: a14cc80655cdb1b3856db2f691fc8cf60b8890e3 SHA-256: a1446aacd759b176071823a7c3129908cf39476441bd577b6f2b240f25e20568
166 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs, including one pointing to a raw IP address, suggesting it's part of a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic indicates a potential phishing or tech-support scam pretext. ClamAV detection and ML classification strongly indicate malicious intent, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.verimevzabavu.cz/ckfinder/userfiles/files/gozevobamopobirege.pdf In PDF document text
    • http://wiskind.com/filespath/files/20210904073845.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/gikekiroxefefe.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/81154973954.pdfIn PDF document text
    • http://identik.hu/editor_up/jigosazesepagadakajesuve.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/mumudirigufurapatipisig.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/wikivufedamuxurimukisele.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/daronifimufowaxakajakig.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/63467937690.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/b959bbb170cc2bf1806fa634d57184d6/57543738522.pdfIn PDF document text
    • https://expomediainc.com/upload/file/nofegozigefika.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/wijorosuj.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/nuseriwadir.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/japobedemodokizewefu.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210901133307.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///wobagukiloso.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/gotilomozominorivisekedow.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/depebilozak.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/55050148697.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/jolixovugutesose.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613b471e8be3e---soludexajidutimajedav.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/gapawogivowuvoviweteniref.pdfPDF link annotation
    • http://www.agot.pl/upload/file/guzuxuwowininolagugotivur.pdfIn PDF document text
    • http://banquat.com/userfiles/files/kifatukuwopipabukelewo.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210915200858.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=gta+5+game+download+mobile+phonePDF 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_off0000db46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB46 10972 bytes
SHA-256: fc8902d42ef465c408fa4917817be5844865f767814e474aa85f12268fdaed22
font_01_sfnt_off0000f428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 18552 bytes
SHA-256: 5c654041027af1ee3534390eef4124eca5dfa6a1d05a01d09992a437940aae17
font_02_sfnt_off00012364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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