Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e64df4ec302304…

MALICIOUS

PDF

70.5 KB Created: 2020-12-23 01:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db2b8a0b039dc7c89024fddc6078ae23 SHA-1: 7760717240af08ac7841ab8ba6e991a574533a7b SHA-256: 22e64df4ec302304397dee8746b8fdd44fbcfbb9d272274e912b950820c6fc13
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://cctraff.ru/strik?utm_term=rebuilding+exchange+donations'. This indicates the document's primary purpose is to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://cctraff.ru/strik?utm_term=rebuilding+exchange+donations
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5fa08c32e46a6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static1.squarespace.com/static/5fc00635ff13940aa23ad6dd/t/5fc3b120fa04221c7190c7a6/1606660384962/mifuseza.pdf
    • https://s3.amazonaws.com/bulujono/roluruluvusavupug.pdf
    • https://uploads.strikinglycdn.com/files/843c6fe5-604c-464e-8330-ab236bffe339/geothermal_valley_coin_caches.pdf
    • https://static1.squarespace.com/static/5fc0ffab8139af037645cac7/t/5fc224843c6ccf69f3a68564/1606558855692/autosomal_recessive_pedigree_worksheet_answers_amoeba_sisters.pdf
    • https://s3.amazonaws.com/gavexilatuvitaz/3939802325.pdf
    • https://s3.amazonaws.com/fuwawibu/ucsd_ece_course_catalog.pdf
    • https://s3.amazonaws.com/rodiligarexo/lowrance_hook2_7_mounting_template.pdf
    • https://s3.amazonaws.com/wanasuvedigo/77626751813.pdf
    • https://s3.amazonaws.com/fukezavazuj/personal_animation_website_templates.pdf
    • https://s3.amazonaws.com/pafiganovavi/xevef.pdf
    • https://s3.amazonaws.com/muvazi/58918383763.pdf
    • https://static1.squarespace.com/static/5fc380a327a199023ac5df36/t/5fc5f2654e98326c02de5972/1606808165535/i_come_with_a_sword_kjv.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca21.bin
d85807c61205efd5ec36e41421166476815818df2815b21dc92489acb6887e90
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA21 5204 bytes
font_01_sfnt_off0000dbc2.bin
ad95cc6f71fabfb7310740a62a92dd7add5b5a6147823d2271e13c089f5f9ef9
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC2 10300 bytes
font_02_sfnt_off0000ff05.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF05 4324 bytes