Malicious PDF — malware analysis report

Static analysis result for SHA-256 2725089bdd58fa29…

MALICIOUS

PDF

80.4 KB Created: 2021-03-22 21:44:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c75624eb34eff0077246aa1e1d7419f3 SHA-1: 16f644436e66382a1e1245e8a409b93917c2ed1c SHA-256: 2725089bdd58fa29c8a42110b14e9e0bf0b336a44cba8f4a6da51b3b640af2f3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://gimoguvi.ru/strik?utm_term=matrix+multiplication+ti+89+titanium+calculator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454988/normal_6057ab54f0560.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/16545414774.pdfIn PDF document text
    • http://zogenapufunog.iblogger.org/what_is_an_indicator_species_apes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_5fd9658648eba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_603ac2616e401.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468571/normal_602b7f41c2a26.pdfIn PDF document text
    • http://mumijivamivaxij.medianewsonline.com/92524810691.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409840/normal_6007661b3e9a3.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/simplemente_inolvidable_mary_balogh_descargar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54cce5a-ea9b-47b6-8004-dc9193ed2d09/skyrim_do_alchemy_ingredients_respawn.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/alaska_drivers_permit_test.pdfIn PDF document text
    • http://wapolijo.epizy.com/12202822287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3044870-174c-4bc2-81f7-6644a3952238/matijevibexagubuvoritek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f5e9ef-7b9c-4f2c-809e-b0ac33074071/11077826287.pdfIn PDF document text
    • http://wezojepodi.rf.gd/marowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b3d850-864a-4eb3-b0be-4b96c061703e/rufibodeve.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0b5701-e747-41a1-99c3-96d97477384c/mcat_organic_chemistry_nomenclature.pdfIn PDF document text
    • http://dibadedogiw.epizy.com/puginixi.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/what_is_the_pact_of_steel.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/ca_2018_insider_threat_report.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_off0000fc4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 5324 bytes
SHA-256: 818896f8ec86b046d4661770e272467192616ca95d508d19e587727f1a800292
font_01_sfnt_off00010e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E65 11100 bytes
SHA-256: 263a9edfba020e6da085a27abeb7f7edc540383f2091ce6cdb6020331ba237a0

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