Malicious PDF — malware analysis report

Static analysis result for SHA-256 586ac83fe0584a56…

MALICIOUS

PDF

78.2 KB Created: 2021-02-21 11:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 533d5564a4cf929445b872f6fc7ddebf SHA-1: 8be7460784ae040186234c109efa62d2e211e9b9 SHA-256: 586ac83fe0584a56cce61f2592ee85c45e9f33969dc3a0bb2142a7dd316efce6
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 or trojan. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('jottigo.ru') that is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to a 'ffxiv commercial survival manual'. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a phishing or malware distribution attempt.

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
  • 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://jottigo.ru/strik?utm_term=ffxiv+commercial+survival+manual+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426423/normal_60265fb2cdae1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5fdba9dbede84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5fdea298b24a2.pdfIn PDF document text
    • http://vekirexime.22web.org/93413959612.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapiwenasadig.rf.gd/ximadakusitibekekejoxer.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/wevokukixupanuborudinus.pdfIn PDF document text
    • http://pubupamosala.epizy.com/74340266218.pdfIn PDF document text
    • http://vokulokunupada.epizy.com/zupipamifavewugesuse.pdfIn PDF document text
    • http://luwazogibuj.rf.gd/lamubitetoguzibudik.pdfIn PDF document text
    • http://rinejifivazori.epizy.com/xuwiwepige.pdfIn PDF document text
    • http://fevufubot.rf.gd/49284021158.pdfIn PDF document text
    • http://zerujafulo.rf.gd/xizobawojenim.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/buwevuwatunujemafe.pdfIn PDF document text
    • http://lubudag.epizy.com/lobuzalejaxime.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_off0000f373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF373 5244 bytes
SHA-256: cf809c9a2e538c7bc7ca55338958ef455c9fa6a298a2c998789483ac0cce0961
font_01_sfnt_off0001053d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053D 11344 bytes
SHA-256: a7eff7ff6a0ca93618f7aedf0fc2c759da7b98e8530053dda3859192439fd228

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