Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b649952f1edf561…

MALICIOUS

PDF

74.3 KB Created: 2021-05-10 06:37:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f3239d2a9cc282a6bc03de2ea8c1fc1 SHA-1: b079466754b296a6a0b786d71eedb666679552eb SHA-256: 2b649952f1edf5615fcf9639292858bf03f01bb653bb9c9967c8f3bd296886e7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to a suspicious domain ('jumiwimov.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to disposable hosting, further supporting a malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest this document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=philips+voice+tracer+dvt2050+review PDF link annotation
    • http://koziwebakeru.iblogger.org/barriers_to_international_trade.pdfIn PDF document text
    • http://fbdirect.site/what_is_boiling_point_of_alcoholzejn6.pdfIn PDF document text
    • http://wordsidepost.top/who_was_the_ethiopian_eunuch_in_the_bibleq8tov.pdfIn PDF document text
    • http://deduwewelu.iblogger.org/sat_prep_book_2020_barnes_and_noble.pdfIn PDF document text
    • http://fogugevup.22web.org/hungry_dragon_mod_apk_iphone.pdfIn PDF document text
    • http://rugavup.iblogger.org/62685469370.pdfIn PDF document text
    • http://reduslim-italiaufficiale.site/korabimatogiladi2gcx4.pdfIn PDF document text
    • http://lamovingcompany.com/89149861153255b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/how_to_read_notes_faster.pdfIn PDF document text
    • http://pasasowagore.rf.gd/rofama.pdfIn PDF document text
    • https://8dea6f00-b35b-4e5f-9f5e-01d9eb130a9a.filesusr.com/ugd/6a8da5_7cf665a0e3fa492f848428a4080fb014.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/chrome_browser_apk_for_mi_tv.pdfIn PDF document text
    • https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_f7e264f0adc34eb09de7347a57ea0d6a.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_7bc2677d677c4e5abdd07ae5b1b9b84a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/begijufadi/63114105086.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/34096206094.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_e2a86b6782104686b1a9957c57d052e8.pdf?index=trueIn PDF document text
    • http://godavuvexo.epizy.com/65883078021.pdfIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_a65b629e03c94940a1ab64380c7ff5f3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/79130519919.pdfIn PDF document text
    • http://xijovapafibowuw.rf.gd/que_es_la_certificacion_leed.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_off0000e288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE288 5712 bytes
SHA-256: ed11bf55cc69c5f73f71c70530f7d284399c8de477da3842ab5f30269f440678
font_01_sfnt_off0000f60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60F 11016 bytes
SHA-256: 6c119039630f1acb47d6151f958e0efe008fcf2448de172b78f6e143eaf7531c

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