Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d66ee4d6b81e295…

MALICIOUS

PDF

83.1 KB Created: 2021-03-11 01:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: bd9f463fc585c9cba1538fa778a6626d SHA-1: f58db85be23a6062db2b06eed3ed05fabd2d2995 SHA-256: 2d66ee4d6b81e2952189fee4875794b5180c15ddad66aaf2c63369cde1d97838
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/award?keyword=analytical+method+validation+as+per+ich+guidelines+pdf'. This indicates the document is designed to lure users to a phishing site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the nature of the redirector suggests it's part of a phishing or credential harvesting campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=analytical+method+validation+as+per+ich+guidelines+pdf In PDF document text
    • http://tagoturuluro.medianewsonline.com/girl_with_the_dragon_tattoo_cast_2011.pdfIn PDF document text
    • http://fagumawegoleleb.mypressonline.com/how_to_adjust_ruud_water_heater.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/take_5_oil_change_employee_reviews.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/sojotevewutawufig.pdfIn PDF document text
    • http://bufezipuduxev.mywebcommunity.org/romanesque_architecture_book.pdfIn PDF document text
    • http://dududuw.mypressonline.com/how_to_draw_out_a_splinter_with_epsom_salt.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/57995963609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372074/normal_6002baf228b8c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459625/normal_5fc87ac7d550f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494668/normal_5fd6490179be6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_60495024ec8d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_601abbcf550a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pizivurapab/dongri_to_dubai_web_series.pdfIn PDF document text
    • http://vekemelegewimo.atwebpages.com/best_21_inch_lawn_mower_blade.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/business_plan_powerpoint_presentation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/weekend_hourly_schedule_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f865629c-c6c9-419d-9a0a-3c4163c5d374/turbochef_fire_oven_price.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/ignou_admit_card_december_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeed6034-0c93-4275-a4ee-9da2601561b0/trane_mini_split_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17905f3e-80ce-4a99-a039-2d0283b715ce/hp_z420_power_supply_pinout.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/charcoal_color_formal_dress.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/american_heart_association_bls_instructor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378e9fb1-d30d-4079-ada6-d6ba506e23ec/xesafatanisigadumisedo.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/83058089404.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/coleman_roadtrip_grill_cover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb466b6-a644-49f0-9630-8a3897560f07/proform_505_cst_treadmill_black_reviews.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 5604 bytes
SHA-256: 25b6dff28168a6732af284dd3e204beabede2b42f19547776974d845faf34b6f
font_01_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 10556 bytes
SHA-256: 24e991a1b76a2f270d82042d30d8297ed9fac75322339c8df2d6a93d0e33958d
font_02_sfnt_off00013042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13042 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378