Malicious PDF — malware analysis report

Static analysis result for SHA-256 806d81d802f4db0a…

MALICIOUS

PDF

71.7 KB Created: 2021-02-25 03:58:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dd353b89c159b89059ef3eba2497c4bf SHA-1: 52947a2a1a8c402e080e3ae7191c090f2891aa86 SHA-256: 806d81d802f4db0a4087ab8ebdb85eb2acf70c4123b1f410b5010a7fb410d49d
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 'crophysi.ru'. This URL is likely used to lure victims into a phishing scheme or download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing and potential malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=parks+athletics+allen+park+mi In PDF document text
    • https://cdn.sqhk.co/xalibolopov/2ig5idQ/best_pc_hockey_game_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/8idNFhe/79086176066.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/g0jcGge/california_shelter_in_place_end_date_may.pdfIn PDF document text
    • https://cdn.sqhk.co/xujifomevesa/gcZYojg/jututipewozilaxuxabo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/jagijcN/star_wars_squadrons_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453540/normal_601a3ab358efe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414156/normal_5fcdd2c8a32eb.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/gurafoga/lasajisob.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/98591234236.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/kaludubokefunidobamutew.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/fixed_term_employment_contract_australia_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/real_caller_id_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/osrs_slayer_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/58220337133.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_off0000ddb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB0 5236 bytes
SHA-256: 05bdfc033d0a0bf425952bece1a27ee5613f0db55104834f4720772b49abfa00
font_01_sfnt_off0000ef59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 10128 bytes
SHA-256: ff63a77f1a2e89507e81afd7696769ce52e6639e142350435f8ed3c3eaa01f97

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