Malicious PDF — malware analysis report

Static analysis result for SHA-256 75938a1c1e59c090…

MALICIOUS

PDF

67.5 KB Created: 2021-01-11 11:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 851bf017ee4a69c26b378761da6c46c2 SHA-1: ef6f650479e102ec41ce4af4a5266ef2edd20b02 SHA-256: 75938a1c1e59c0905f015151ebf0da0b6f34414a898516a89401109215976014
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to redirector infrastructure or potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier further support its malicious nature. The embedded URLs and the heuristic firings suggest the primary goal is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/aws?utm_term=hd+couple+wallpaper++for+android+mobile In PDF document text
    • https://cdn.sqhk.co/genamudazunu/ieja696/bijogugenowego.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413113/normal_5fc903ddb3b7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371523/normal_5fd07074ab5e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452169/normal_5fbe9e4fc05e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8fdda927843.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/7fca9fd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414515/normal_5fcc3ae952c78.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/hhwgegc/charades_words_for_adults.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428078/normal_5fe051511be89.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/rijihoH/coin_collection_album_pages.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/mukutud/continuous_and_discrete_data_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/biodiversity_action_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/89753994658.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_off0000c807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 5316 bytes
SHA-256: ae4ab3c80f86dfd905ff0a687317321dd54cf17456c42dbc9572d22ab358b803
font_01_sfnt_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 12388 bytes
SHA-256: 4232536885406f3fbade6392fe83247716c038924c0458f253d712798b61f883

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