Malicious PDF — malware analysis report

Static analysis result for SHA-256 6784f86ad8c6a225…

MALICIOUS

PDF

73.0 KB Created: 2021-09-14 16:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3276901472d87eb486d205b286e904c7 SHA-1: 70e85113253460bbcaab69e35e3ae7b0e5f86070 SHA-256: 6784f86ad8c6a2256bc0a9632432ddde012958de979f3a0ea6c6859823ea3fd2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to disposable hosting sites, indicative of a link farm designed to host malicious content. The 'SE_CALLBACK_LURE' heuristic suggests the document's content is intended to trick users into calling a phone number, a common tactic in tech-support scams and callback phishing. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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.
  • 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://nacionalequipamentos.com/ckeditor/uploads/files/napiwero.pdf In PDF document text
    • http://fese.in/ienupdimages/images/files/30248308049.pdfIn PDF document text
    • http://murielbellhomes.com/userfiles/files/86707009829.pdfIn PDF document text
    • http://kvarkeno56.ru/userfiles/file/80714763597.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/44119523334.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136511311e9e---faguwezazazupiramug.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/29012455666.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613977a246409---nakuwesusasubanoxopi.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16135a5010c3f2---xopadudesidonidadenix.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/lonoronawobujorevigekufe.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/28870129657.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/44628809347.pdfIn PDF document text
    • https://protrialse.eu/files/files/91456682987.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d43357306a---39326062276.pdfIn PDF document text
    • https://matratva.in/userfiles/file/1924667974.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site/site/data/files/39068631.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2d0b00fce---65880801110.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fffb82b569---juxogenosototukoxukijaka.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/20050164350.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/60036795964.pdfIn PDF document text
    • http://szerecsengyogyszertar.hu/editor_up/4890002001.pdfIn PDF document text
    • http://cityfate.com/files/files/38065518557.pdfIn PDF document text
    • http://keacg.com/upload/files/kizuvu.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/53249899666.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16133f498cdd24---kuvilomomiberafa.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad5ac56543---13097178373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=dead+trigger+2+modPDF 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_off0000bcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C3 10392 bytes
SHA-256: fd1b9fd9b6c82f296525ce3b507fa81cf228052366057eeb37bd0bd98beb0a27
font_02_sfnt_off0000ec1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1C 16548 bytes
SHA-256: 5ab29532061eea9c7b03cf12fea3a5b5d4f98efaece4d8a3e7c7cb2c39fa043f

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