Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b042a24b323973…

MALICIOUS

PDF

74.9 KB Created: 2021-05-23 22:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b11a1d12645b19f02099ad8f65ba9310 SHA-1: 226d3b3079aa5102b966fbe3fa5068ae0dc453ac SHA-256: 52b042a24b32397350a5d4fe83e3ff7b17a329d5e0a013a12a0ed4830bb405ed
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that promises a free download code for Minecraft, a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the presence of the malicious URL and the document's nature suggest it's designed to trick users into visiting a site that likely hosts malware or engages in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://zajinet.ru/strik?utm_term=minecraft+windows+10+free+download+code PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458122/normal_5fcbb3e061f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468536/normal_604657ab4f678.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367947/normal_5fc8286fd6d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446174/normal_5fd8576e72db0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446944/normal_606e31874e04b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_6062aa950b5eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384159/normal_5ff79028dc202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_6015c552788e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422133/normal_605637429fc02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5fe938646bc55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_602fd870a5748.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5fe59acd46721.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_60208c49550fc.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/kavugusepe/heil_heating_and_cooling_systems.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/28328173291.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/sharp_aquos_remote_gb118wjsa_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9922212d-42e1-4cb7-bc24-66c479b83c81/best_way_to_seal_bottom_of_exterior_door.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf57d91-7b3e-4f86-839c-fbf405deace2/python_tutorial_for_raspberry_pi.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/43683354676.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/roblox_game_scripts.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/rexugomovitibetekog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1d6918-d259-4b21-b994-bbbbacddeeb8/31769714424.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/cuisinart_11_cup_prep_plus_parts.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_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 5308 bytes
SHA-256: 8b6c0bb807d1a2284f9e007c2d6e39cf178b971c5977adbff946bd56f9d937c4
font_01_sfnt_off0000fac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC4 10448 bytes
SHA-256: a71b00e181734d2c360571d15591496b31981292bbe10657b8cfa2b3d7c6c5bf

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