Malicious PDF — malware analysis report

Static analysis result for SHA-256 807807cab556029e…

MALICIOUS

PDF

73.5 KB Created: 2021-01-14 16:31:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3e84208b2b70428f6f854871df74a38f SHA-1: 7c948cc7c57dce68fccc95dfd6d9d627fe27da79 SHA-256: 807807cab556029e5e259f829fb4a88e93c7cd61b8fd1c6750d13b08c48932ab
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic firings indicate the PDF is designed as a link farm on disposable hosting, aiming to direct users to malicious infrastructure. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://ggtraff.ru/123?utm_term=financial+mathematics+formulas In PDF document text
    • https://static.s123-cdn-static.com/uploads/4393883/normal_600028fca0444.pdfIn PDF document text
    • https://site-1202636.mozfiles.com/files/1202636/starlink_satellite_launch_live.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5fd5f6657396e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5f8a27d7d121b.pdfIn PDF document text
    • https://site-1175781.mozfiles.com/files/1175781/46040924039.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/7893042.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/gomerenarumezujej.pdfIn PDF document text
    • https://site-1178541.mozfiles.com/files/1178541/nhl_scores_blues.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481831/normal_5fcf8cdd44941.pdfIn PDF document text
    • https://site-1171656.mozfiles.com/files/1171656/7451777804.pdfIn PDF document text
    • https://site-1178280.mozfiles.com/files/1178280/ralphs_menu_ice_cream.pdfIn PDF document text
    • https://site-1166595.mozfiles.com/files/1166595/69998976510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5fb4bac438847.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/dofufiri/soul_knight_hack_ios_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/globo_reporter_noruega_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/17775488958.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_off0000e20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20F 5076 bytes
SHA-256: 7724c05fdff1468c86cf391eee43e9d4d47605021138c765cddb7eceab003e6c
font_01_sfnt_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 11232 bytes
SHA-256: bbe12a8e93b7174c0e32e9c6a1082125af1eb31f0598af244fb010c9f9fda8b0

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