Malicious PDF — malware analysis report

Static analysis result for SHA-256 de2ed774dc3934e1…

MALICIOUS

PDF

77.2 KB Created: 2021-04-29 22:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c46bc8c9da28b01cb2f1121cfb260a32 SHA-1: eb6be9ca2132c84b65353996ec1857e52541e4a5 SHA-256: de2ed774dc3934e11a33f247662f5623cfd2cc7cb9e64da37622a2d2bae3b14e
186 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, consistent with a link farm or SEO spamming operation. One of the primary links, 'https://bologen.ru/strik?utm_term=social+contract+meaning+of+malayalam', suggests a potential phishing lure or a redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://bologen.ru/strik?utm_term=social+contract+meaning+of+malayalam PDF link annotation
    • http://fogafiv.mypressonline.com/how_to_use_a_lean_mean_fat_grilling_machine.pdfIn PDF document text
    • https://nifiwaratobiwe.weebly.com/uploads/1/3/5/3/135346776/6467962.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/nNBhcYM/dufog.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/27180854523.pdfIn PDF document text
    • https://cdn.sqhk.co/kutajanode/jhharjc/devaxuwipunogefipol.pdfIn PDF document text
    • http://patedeziw.mypressonline.com/separate_pages_iphone.pdfIn PDF document text
    • https://fesunoxatufaf.weebly.com/uploads/1/3/4/5/134519878/1306878.pdfIn PDF document text
    • https://jadojojipolukot.weebly.com/uploads/1/3/5/3/135337887/rapebovimilefumad.pdfIn PDF document text
    • https://xuwogufovesuvem.weebly.com/uploads/1/3/1/4/131406895/4672329.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/national_geographic_magazine_april_2020.pdfIn PDF document text
    • http://julubavixukab.66ghz.com/after_movie_clips.pdfIn PDF document text
    • http://sipebep.22web.org/how_to_remove_kidde_co2_detector.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3f9320ff-391d-49df-b192-c557e211a93c.filesusr.com/ugd/469aea_a546f47069604ea4a99d6e8c5a51cb1c.pdf?index=trueIn PDF document text
    • https://34e51215-b586-4e01-b3ea-a219475a7b91.filesusr.com/ugd/46481b_cc777038287d42a282baa594016927d7.pdf?index=trueIn PDF document text
    • http://koriwironawuva.myartsonline.com/memadijan.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_477b65fd7c2a40faabfb53889c195585.pdf?index=trueIn PDF document text
    • https://488a161d-122f-4e25-b35e-34d1d0e27b34.filesusr.com/ugd/bbc910_ddfc1be8870e4f78995ac423fadab1b9.pdf?index=trueIn PDF document text
    • http://kubunixa.epizy.com/what_is_elasticity_in_economics.pdfIn PDF document text
    • https://1c896d37-30d1-4b4d-9537-98f963aae812.filesusr.com/ugd/865d50_550ac451cdb2489fbab63119bda52666.pdf?index=trueIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/numexa.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 5228 bytes
SHA-256: d4a081139f196adc8d7b11292b456075f318d108f102a57f982ca7b2b468155d
font_01_sfnt_off00010351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10351 10532 bytes
SHA-256: 3d975405b2fb8ce58bf43e0065925f30b225ed285eeea335f4f664ec3febbde7

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