Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6f315eadd373cb…

MALICIOUS

PDF

72.5 KB Created: 2021-02-20 22:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 09f791b61e5e1dea85fdd8480c202e36 SHA-1: a2bb4792fcc706edb81116ac4d250f08ad34f637 SHA-256: aa6f315eadd373cb56b44c807ec3d417c19225e439450e8447496f233ca3c3b1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to 'bologen.ru', suggesting it's part of a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the heuristics indicate a phishing or scam attempt, likely leveraging social engineering to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://bologen.ru/strik?utm_term=toto+washlet+replacement+parts PDF link annotation
    • https://cdn.sqhk.co/ruzaxube/hhgcWX2/nokagowalomurifoji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489244/normal_5fc890302099c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424645/normal_5fc726ce2e01d.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/i9haDji/sijifasezomo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421629/normal_5fff7574424bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_60170b8aefd2c.pdfIn PDF document text
    • https://cdn.sqhk.co/manigonodapu/rn1gd6a/jezepetetewukax.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/bfXfUMt/final_fantasy_14_classes_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/Khhgdvw/99758731620.pdfIn PDF document text
    • http://funseeds.site/1602862168wk3ue.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/dhhjcjc/loopers_caddie_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/jebixusugak/RuQhbSd/vivesanurizudino.pdfIn PDF document text
    • https://cdn.sqhk.co/filomada/1VkjbZ9/parekunenimawikugeve.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/jjDAgdb/3238877272.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/hIiieib/male_mannequin_3d_max.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/ggiRiil/gowelesivasokizifaxufiku.pdfIn PDF document text
    • https://cdn.sqhk.co/logubaxe/jiGurgi/20522922493.pdfIn PDF document text
    • http://all-casino.xyz/14256872528gg34x.pdfIn PDF document text
    • http://mamontov-net.cc/82738392885gztyk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fazomexaboru.rf.gd/beaker_full_mod_apk.pdfIn PDF document text
    • http://basefub.epizy.com/muvizivevojizofiwetuw.pdfIn PDF document text
    • http://xolemobubusosi.rf.gd/34918955994.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_off0000ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 5212 bytes
SHA-256: 1def778213e2e883b963342b67aaa0d43fb62802ff0c8c782fb777260dba77ce
font_01_sfnt_off0000ef9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9B 10908 bytes
SHA-256: 5cbaf5bf5ca93fc4d4d6218a4a83ec549fe6ce4c8d67ad2ea3693c973a82cc05

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