Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28ba696b74a2dbc…

MALICIOUS

PDF

79.3 KB Created: 2021-01-20 08:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 077333fde33660047bd4cd24f5162db7 SHA-1: 1adea460dc6ad38cd2fc2a09f55e8f7fce2ef246 SHA-256: f28ba696b74a2dbc56c41d1262f56d26d257e8edb622f7dd4651ca33622fcbbe
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to 'yafferge.ru', which is identified as a malicious redirector. No scripts were extracted, but the presence of a malicious link strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://yafferge.ru/123?utm_term=bsf+lesson+26+day+4 In PDF document text
    • https://cdn.sqhk.co/wudawagirus/ShicbUf/fm_17_wonderkids_list.pdfIn PDF document text
    • https://site-1171689.mozfiles.com/files/1171689/73123756303.pdfIn PDF document text
    • http://tazasimeli.22web.org/difujemivat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449996/normal_5ff2bde475d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5fad78e426581.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/gjgggci/rake_monster_hunter.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/cKxgjGT/jurassic_survival_island_dinosaurs_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f8d7be07e0cb.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/gj6c9rw/75698386892.pdfIn PDF document text
    • https://cdn.sqhk.co/konidadelan/yCG7zgh/vedagatad.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/gihiFa2/lafawulobaz.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/5HXNLfy/ghosts_of_mars_movie_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_5ff072a29e930.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/1Wjbjj3/zombie_tsunami_hack_full_level.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sumojoripira.rf.gd/16234488774.pdfIn PDF document text
    • http://zapudeni.epizy.com/baruk.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_off0000f4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E2 5328 bytes
SHA-256: 5cedb0ebd6d189231e4e0b72c53eb366b918b68c4fc30b93441d0325c21c993d
font_01_sfnt_off0001072c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072C 12248 bytes
SHA-256: 3bda6dd96bf85dd79f4657ec5bea1f30d38aec75c35d02f72d5c4f40a9860d7d

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