Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdbb8681eae78f31…

MALICIOUS

PDF

86.2 KB Created: 2021-01-06 03:33:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 75f8619ba7e3f2ecc81354f18e075c48 SHA-1: d662867b0c74b701634071950a6c9a5784a5edf1 SHA-256: fdbb8681eae78f3183b19ba577dc290c26a300ab3233d830e9cdfcbe2b2906ab
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'vegetable chopper manual', likely to trick users into clicking the malicious link.

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
  • 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://traffine.ru/aws?utm_term=vegetable+chopper+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fda15137069d.pdfIn PDF document text
    • https://cdn.sqhk.co/liramesot/RQM1je7/zenonia_5_offline_apk_unlimited_zen_free_download.pdfIn PDF document text
    • https://kupanonul.weebly.com/uploads/1/3/4/6/134682697/40a5e5.pdfIn PDF document text
    • https://kajurizekevebok.weebly.com/uploads/1/3/4/5/134586758/7156678.pdfIn PDF document text
    • https://bovatukal.weebly.com/uploads/1/3/0/7/130739183/a4e2634.pdfIn PDF document text
    • https://sapuvitajesi.weebly.com/uploads/1/3/0/7/130776539/lufamefarexiru.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/gh4igIk/easy_chocolate_icing_without_cocoa_powder.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/bbb181b5-b96f-4377-9cfe-4905e3577d5d/can_hit_kill_jiren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2badf261-0d7e-4de5-b9be-bb3d8514a4fe/alaska_ice_cold_killers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f97fd1d-3a45-41dd-81dc-e674ad757a90/the_childrens_book_of_questions_and_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00011cda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11CDA 26044 bytes
SHA-256: 9f8099676d06f479a43be5041b76eda856a0427dec4b276458d4132d2839b937
font_00_sfnt_off0000e5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D9 5272 bytes
SHA-256: 0c14ac0922533e0a79f0b8703c3bf4b42e169bbce70dba3643c8fd310b3307a1
font_01_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 11032 bytes
SHA-256: 004b3b34086d98b88cd6007c6afc85a7870761babdb8d503bcd04cc2142e9187

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