Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb217ecf73c024d1…

MALICIOUS

PDF

83.8 KB Created: 2020-11-12 21:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 23c2bd0c9b3bbce1d6eb56e224d72f28 SHA-1: 87e1b48dd598a512bd321b68bd55614e4c68f81f SHA-256: cb217ecf73c024d175e600183eb1164c5954143c6613f044145178511e01dd1a
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/strik?utm_term=istoria+culturii+si+civilizatiei+ovi'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/strik?utm_term=istoria+culturii+si+civilizatiei+ovi In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_5fa8e9eb47050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f8b347ab215f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f8c9a348878d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366384/normal_5f9400ebb6254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f9011cc80665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5f8b6cd2c3d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5f9b49164324a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_5fa68ffd9490c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_5f9b9070a718d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f9228fc791b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f8accacc5fbc.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/d3058711-d671-4b65-ab99-580822757969/75461147440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb3a9444-28da-495d-92d6-5ae018b8fdf8/map_of_the_simpsons_springfield.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab3082e-40a5-491a-86e9-a57258ae8cbd/19084421136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add03c36-d013-4032-9a24-a91d71af7aa8/3563792492.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_off00010ffe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10FFE 27696 bytes
SHA-256: 010b76ae2ad6e90ef0fdce1b619bb225fb95ed4c982ecafc1e0ee52ef9e73efe
font_00_sfnt_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 4840 bytes
SHA-256: 4dc5a63b89fb672fa58987d8433834f6dbab53114d0731f512084e30104ff9d0
font_01_sfnt_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 11512 bytes
SHA-256: ac8389756b11986db4f34d5e4683433c668c311d360276beba1db3cc01f790e4

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