Malicious PDF — malware analysis report

Static analysis result for SHA-256 d176cf8d7edd3a61…

MALICIOUS

PDF

75.0 KB Created: 2021-01-10 09:08:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 455925dc136674eb21e945114038ae2a SHA-1: 20b14407796399c495ec74e0e276fe6480307abc SHA-256: d176cf8d7edd3a616883f629292729304b06dd72c7c532b296fefc21b16711a9
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple external URIs, including one pointing to 'trafficel.ru' with a 'cad 2019 crack' UTM term, suggesting a phishing lure for cracked software. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'SE_SECURITY_BYPASS' suggests the document may instruct users to disable security software, further supporting a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=cad+2019+crack PDF link annotation
    • https://site-1083772.mozfiles.com/files/1083772/66598691688.pdfIn PDF document text
    • https://site-1176181.mozfiles.com/files/1176181/anime_wallpaper_4k_live.pdfIn PDF document text
    • https://site-1197316.mozfiles.com/files/1197316/zelonexulab.pdfIn PDF document text
    • https://pejegenipejixe.weebly.com/uploads/1/3/4/8/134848799/pubumasuzoto_betokefu_xomezidunudada_nukixez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_5f9cfbc3af72c.pdfIn PDF document text
    • https://jakazopafekitab.weebly.com/uploads/1/3/4/6/134632018/togumak.pdfIn PDF document text
    • https://site-1180945.mozfiles.com/files/1180945/airplane_for_sale_florida.pdfIn PDF document text
    • https://site-1171417.mozfiles.com/files/1171417/wezexutekuwopuvaruf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5fc14a5e7b797.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/juvetaso/kindle_paperwhite_file_format_support.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/wodojugudoviwuxobexidil.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/zeros_in_the_quotient_worksheet.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000deb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB8 5176 bytes
SHA-256: 978d43c5109b47ff84367e5b43a2c05b371153dc272384c43fd02cf67aaca43e
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 11196 bytes
SHA-256: 786f82fb150c05926fec8cbb2f6348180ac917ac1e6483182d32286cdb31b08d

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