Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72ed137fdafc1e4…

MALICIOUS

PDF

73.2 KB Created: 2020-12-25 00:34:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 33e8629a3623ad10b8debf7f8a3d9f97 SHA-1: 7bc331623a8271085ea6a21172fed9c121832024 SHA-256: d72ed137fdafc1e42fc7057088b313a75aa88dd0aedaecbf7aa910e157b316d9
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with at least one pointing to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/123?utm_term=staples+passport+photo+price In PDF document text
    • https://cdn.sqhk.co/kurapobal/jaijrA5/40542049931.pdfIn PDF document text
    • https://cdn.sqhk.co/lofopapenow/jchj57g/3d_car_wallpaper_full_hd_download_720p.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/hcmcbhc/living_a_boy_s_adventure_tale_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/FhfpstP/67813740564.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/xizefotiwira.pdfIn PDF document text
    • https://bejulukif.weebly.com/uploads/1/3/4/7/134746679/5bfc1a2ccedd.pdfIn PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/1477369.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/gixawetopoli/vega_automatic_pump_control_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/ludutakulakorefi.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/87733317438.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/cover_page_template_word_for_company_profile.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_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 5124 bytes
SHA-256: 4b572ea2ce3ccde82696b469f8c37b5ccbde5e404510a631805987f6e41be271
font_01_sfnt_off0000f322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF322 10732 bytes
SHA-256: 5cdf7065d8412c2a201b0e3ea05384b8ae29d39e4a51da586f1d6d50ebb7a2d3

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