Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78be71d08f629a4…

MALICIOUS

PDF

76.9 KB Created: 2020-12-09 09:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a03fdbf02d5daee2bb4831b2e914556e SHA-1: b801d10f02e0f96a8b8ded4b0a892cb0756056a2 SHA-256: e78be71d08f629a4bffa001b7bccc67c704fd63d09956fdef0b5a171f8d5b121
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by a machine learning classifier and ClamAV, which specifically flags it as a phishing trojan. The presence of an external URI pointing to 'trafftec.ru' with a 'poketrack apk 2019' UTM parameter strongly suggests a phishing attempt to trick the user into downloading a malicious application. The heuristic 'SE_DOWNLOAD_BUTTON' further supports this by indicating a visual call-to-action within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafftec.ru/strik?utm_term=poketrack+apk+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368741/normal_5f9e4950ab976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481058/normal_5fad4a5c40641.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/gizonukorad/algeo_graphing_calculator_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64a715687f52b6ba5cdb4/t/5fc6f28fe2dcb1274de18ff2/1606873744075/37016660903.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf3b34e98326c02d56153/1606284212281/power_of_2_hash_table.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d88a504bb4653ce18603/t/5fc89cdb970db930d9c53abf/1606982877586/bewatabaxaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf6866a371610b876ed51/1606219405563/jerabivotosizodegim.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15c11ea4a794d564840ae/t/5fcc2644978da30c56ee2bb0/1607214662570/82923542869.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59fc86609fd0ee7b1b465/t/5fcd9aa0eb18547f4b9f4c3e/1607309987059/mortal_kombat_9_finishing_moves_xbox_360.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b405161f8068bed02ab5/t/5fd01e6448ae4d1218f5c3b7/1607474788888/best_ice_hockey_prediction_site_in_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/1821474896.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_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 5264 bytes
SHA-256: 81c36329d73646587c8f2f317c96cd1c1350c544c84b25df1270c49e8d6858c6
font_01_sfnt_off0000feab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAB 12928 bytes
SHA-256: e90e4261277dab6a15704a204b863ee917f4a355d03da5d864a75b51b472e222

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