Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4357dd56ae323d…

MALICIOUS

PDF

75.5 KB Created: 2021-03-05 19:22:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8fbdc80e1474cc7893e3fcc4bfc254c6 SHA-1: 2aaf2114ccd7a07fb42fa951ee574b377c35ac5f SHA-256: 2a4357dd56ae323d87115fa73ac67c01954019f8f8ef5781a3f47e8ac1923073
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a site offering a 'Pokemon go new update apk download', which is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/wix?keyword=pokemon+go+new+update+apk+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446774/normal_5ffc9586bed5e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451752/normal_5ff84c96d7d4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372076/normal_600854c26e98e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fd64ad5e9044.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/081d9c78-23b6-4c45-89f7-4dab0e821373/59449615230.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfe2f74-3cd3-4b05-9a49-9d3024ac7883/latest_celebrity_news_uk_gif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb022f8a-ce6d-4409-9017-95ef66dba1c6/the_science_of_psychology_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c805d0e-c574-4408-ba8f-d634e993cfa5/2000_gmc_sierra_starter_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828401a1-afc0-400c-bf71-f4fc6bd12532/weber_grill_replacement_burners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/472ddf99-cd62-44fd-b913-1db2c92e70f9/mini_mental_state_examination_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d751f866-7d6d-442b-8257-5e1eb9955fab/sag-aftra_ultra_low_budget_agreement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f174325e-7f6c-4cfb-95a5-db44b2a9f852/where_can_i_swap_my_sodastream_gas_bottle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e3468f-27f1-4f13-8607-2dacd69e937f/14354391998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fbcc46d-33e0-45b7-ac75-6444eadea7a1/how_to_do_a_debate_in_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126b1924-2160-48a3-943a-db85597b1512/how_to_make_a_study_guide_for_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9595b1f7-fcbd-4583-800b-56272f842bd9/24676065240.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_off0000eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEB 5164 bytes
SHA-256: 6191f69edd4f64281e6b67d3974b1c81f5d36a1652289dc1cea2ee5333ab4d6f
font_01_sfnt_off0000fc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC85 10704 bytes
SHA-256: 729ddd73871d6ebeff4557e96b56851a14beb0e7a67e5c728f683cd2f47cfa42

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