Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc550105f0dfd5c…

MALICIOUS

PDF

82.5 KB Created: 2021-04-27 18:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3e730d9210c1b284056270d36818fccc SHA-1: 2cbabc16e6ac3d6f1f8f386b2f9c6d05801435b3 SHA-256: 0dc550105f0dfd5ce8664b873576b02d2b93bb1065b9d759383119d3f29920f5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://dafemum.ru/strik?utm_term=football+manager+handheld+2020+tips'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to 'football manager handheld 2020 tips', aligning with a phishing attempt to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=football+manager+handheld+2020+tips In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_6010d357765b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499002/normal_5fc8cf6f7d3ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401714/normal_5fe182fb30714.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367278/normal_5fde8f95c1244.pdfIn PDF document text
    • http://femetorisufi.sportsontheweb.net/al_arabiyyah_bayna_yadayk_vocabulary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468563/normal_605d126a545e1.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/zagapaxa/49349658707.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/typical_septic_leach_field_design.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/93295256527.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/someji.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/sukogosobadi.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/xojuwum.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/cuisinart_grind_and_brew_coffee_maker_replacement_parts_canada.pdfIn PDF document text
    • http://jatugeset.atwebpages.com/standard_tire_size_for_2012_chevy_impala.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/how_to_use_a_honda_gcv190_pressure_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/puzugaxibetelidilu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/wusotuzajavoj.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/34056750757.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/balepapiz.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/ballymena_united_former_players.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/calculating_slope_from_two_points_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/lexowekaponanak.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_off000102ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EE 5744 bytes
SHA-256: 8c4690151ad9fa424680d4763b420b03cea8d58abe8068293aff9548983edb12
font_01_sfnt_off00011642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11642 11140 bytes
SHA-256: 99322b1096d0285e33dbd0012b7d76be6d2473dc15332da06ddec016660701e8

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