Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf09aed94613560…

MALICIOUS

PDF

75.7 KB Created: 2021-02-27 01:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ce2f7ded17b24719276bc61f1ed838a0 SHA-1: 8f559756984635e6312292e16f1a67eb28cbb27b SHA-256: eaf09aed94613560faed747a88e67a09370b023e78b95526aef290543d1d36d0
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, including one that appears to be a redirector for a phishing or malware campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to a product review, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=rascal+850+mobility+scooter+review PDF link annotation
    • http://mon-cmb.best/53626291247tej7f.pdfIn PDF document text
    • http://sellamorem.com/terufojewanobuvanaxjja5.pdfIn PDF document text
    • http://circus.market/sutujolixubarobafutumx9ybn.pdfIn PDF document text
    • http://load-bcp.com/rivotutobawid8r54a.pdfIn PDF document text
    • http://shop-onlain.fun/navotelagizer9u5wr.pdfIn PDF document text
    • http://subfamjtii.site/71123385408jdv8l.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/gjgjjt6/13185527817.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/FRgdxih/lebogevumovaze.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/bAibRij/viva_video_editor_download_for_pc_filehippo.pdfIn PDF document text
    • http://dogusiwimukames.iblogger.org/crystal_oscillator_design.pdfIn PDF document text
    • http://maruwikugob.iblogger.org/tip122_darlington_transistor_datasheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dadosekim.epizy.com/amt_tax_reform_individual.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/azure_information_protection_step_by_step.pdfIn PDF document text
    • http://xifupoxenopi.epizy.com/rebukinini.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_off0000eada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADA 5804 bytes
SHA-256: 7a45b67fef1b0e5e595698facc9c524c12ba71879c06b6ed3776f1e9e8909ad5
font_01_sfnt_off0000fe9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9E 10428 bytes
SHA-256: ca726b82c44bfdb642b67f87fd8e2bb6b2b55eb2bb1291e610879650dd5d8e79

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