Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa13505ff7d5120…

MALICIOUS

PDF

72.7 KB Created: 2021-01-15 06:41:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b6fc8671bff4303edc9a940d0a2c3b5 SHA-1: 26ef678dae8021d4af48f6efb8d769a9e58e2359 SHA-256: daa13505ff7d5120b0895876abd016944ba3ac210d699ecb2d0ae11e77e8d722
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for a PDF redirector link to a known malicious URL. The ML classifier also strongly indicated maliciousness. The embedded URLs suggest an attempt to lure the user to external resources, likely for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=ishikawa+fish+diagram+template In PDF document text
    • https://cdn.sqhk.co/rumobotituda/8iejhhh/risitawapabosuxa.pdfIn PDF document text
    • https://cdn.sqhk.co/vosiwuli/hcIhbib/87114663129.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/iggcDpD/ichoice_smart_pulse_oximeter_ox200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_5f948d23eb4e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5fe62b89444c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fa2344f70f6a.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/shejaig/hits_of_olivia_newton_john.pdfIn PDF document text
    • https://cdn.sqhk.co/nujudemugipi/h2jidsx/epic_games_launcher_fortnite_apk.pdfIn PDF document text
    • https://site-1183169.mozfiles.com/files/1183169/alice_in_wonderland_bingo_game.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/gifiz/all_song_ringtone_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/53484952321.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_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 5120 bytes
SHA-256: 975b64208a7470ff2c7b27d8e327eddbac41c0036002e28a3b6d93e0aabf6951
font_01_sfnt_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 10088 bytes
SHA-256: b571a05e5e4a7ef537c6cb9abfce169987c1f2cfad2b88ad589081038777a741
font_02_sfnt_off00010845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10845 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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