Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b10a0d8890250c…

MALICIOUS

PDF

76.7 KB Created: 2021-04-14 08:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5276a647f22906443de887cf30fa731c SHA-1: cc6572f10f108cdc7cd988df817447fad1a0e8a1 SHA-256: c0b10a0d8890250c67e80803bc0c49f7cd8e6a81bf2db614df650c08d8a525a8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'whirlpool fridge repair service near me', likely a lure to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://mezovuduw.ru/strik?utm_term=whirlpool+fridge+repair+service+near+me PDF link annotation
    • http://ideaita.fun/38877649724lb638.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/heTHLst/orbia_tap_and_relax_apk_download.pdfIn PDF document text
    • http://the-glow.ru/89689796604tkt3x.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/TaXrgcJ/weekend_weather_liverpool_ny.pdfIn PDF document text
    • https://cdn.sqhk.co/pinepopowig/uhE2jhZ/exorbitant_definition_fr.pdfIn PDF document text
    • http://steelsho3.club/razer_synapse_download_win_102ozme.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/jevN1Hp/human_fall_flat_trophy_guide_speedrun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_60293ed299c3e.pdfIn PDF document text
    • https://cdn.sqhk.co/nudofarus/icidsij/fuwelenemosu.pdfIn PDF document text
    • https://cdn.sqhk.co/ripowusaro/cjckxha/53422673098.pdfIn PDF document text
    • http://tronreserve.online/jipanavefuxijufifevays4k2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_606cc27059d30.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/chehdOo/46292876268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_6026f1ccb678f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_604ed4903cd03.pdfIn PDF document text
    • http://esagafow.fun/kidde_kn-copp-3-rc_endyq5ac.pdfIn PDF document text
    • https://cdn.sqhk.co/vipikunowi/abjZggC/51076245598.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/aIje4gg/gizirotasix.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/hHJijhd/fox_news_trump_live.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/cngfjbd/top_scorer_in_ipl_2019_orange_cap.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/y7bjjgL/45325194732.pdfIn PDF document text
    • http://lemufarora.22web.org/88287163017.pdfIn PDF document text
    • https://cdn.sqhk.co/tatiderubota/7hfjaIv/bowling_near_me_prices.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rilimopukalus.rf.gd/o_que__capitalismo_catani.pdfIn PDF document text
    • http://jizonizop.rf.gd/sarad.pdfIn PDF document text
    • http://xezerubewuxa.epizy.com/real_mathematical_analysis_pugh_solutions.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_off0000eb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB84 5644 bytes
SHA-256: c7a99ebdeaf36e15ffa2fb5cb88049ab45bf02b9a473d4f0ad19f31d5f9d3db4
font_01_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 11444 bytes
SHA-256: 0fb041ff5ffa337aed67f23325dac316141c41f32a91e2e8f8dd8b753560996e

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