Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb6e4590487e038…

MALICIOUS

PDF

61.7 KB Created: 2020-12-19 15:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e51538a3d1d1554a7703cd3116dace9b SHA-1: f175d4786c45f08371f084af8e5028ae6cf6b858 SHA-256: 2eb6e4590487e03881e65aa664066d0e9e236123597386c1fc797c2d2e250a37
104 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing page. The presence of a 'download button' heuristic further supports a social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffset.ru/aws?utm_term=bud+light+logo+vector PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401538/normal_5fa1559f4433c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_5fb5c3c98fc58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449009/normal_5fc3e1dd7538f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vokeri/3299233093.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/tevanomebovozetidizadi.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/bubusimetapinixuwo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5662f0b6b03258f5376ce/t/5fc7dbc9681da4777abede2d/1606933450218/8_ball_hero_relaxing_billiards_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/animation_in_android_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f0502f-7b8c-42fc-aa27-bcf92c0a88df/62882456716.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51ce4d26ff1194f8f2d2c/t/5fd6e1ba0f11661d4c3ef03e/1607918013162/chalte_chalte_new_song_ringtone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc136563398ff7515300e75/t/5fc58fd3e18c5c478eb9eab9/1606782935205/numijevamigexafojomo.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/crowdsourced_funding_platforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8848e3f1-7bd9-4383-8ee7-d4d8026311a1/nizowamalisozadenasitu.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/bleacher_report_smackdown_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/vapafefosivumojifonime.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABCD 4696 bytes
SHA-256: ec5c1e4fcfbc99f3de43fa37b45f3741f1c04fb3d65e73fa8d6aee3f2ac7b72c
font_01_sfnt_off0000bbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDE 9492 bytes
SHA-256: 037b132f671acc752e5f333ac6b5187def79e377a414d63c7b323a18d23d710a
font_02_sfnt_off0000dc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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