Malicious PDF — malware analysis report

Static analysis result for SHA-256 d808da40770f4fee…

MALICIOUS

PDF

65.6 KB Created: 2020-11-26 09:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 8f304b345fad5dceccfbce574e750eba SHA-1: eb1474a8294b065b0dd679c17a2a139838340885 SHA-256: d808da40770f4feeff26e46720f9a8cd950d1eade1b5493a1d3c93e7cb05fd3c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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/123?utm_term=nerd+rage+pokemon+comic'. This URL is likely used to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious redirector suggests an attempt to deliver a payload or phish credentials.

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://cctraff.ru/123?utm_term=nerd+rage+pokemon+comic In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_5fb889df95e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5fa26325596ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_5f9393f116037.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_5f996e3618968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vebisop/xolirakemude.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/mr_o_donnell_coyote_ugly.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/dubafisone.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/crisis_dolorosa_anemia_falciforme.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/13681894665.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/ielts_speaking_test_part_2.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/25440634043.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C3 5216 bytes
SHA-256: f9f5aa59b8b49eb1a7980d2e15bab46a49e434f7e3dce97a887ed5b5216a0cbc
font_01_sfnt_off0000d57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 10712 bytes
SHA-256: 33d276ec440fc89225efef2fd848e6bed8dcea7df88e17af8521a5d7d699054f

Open this report in the interactive analyzer, or submit your own file for analysis.