Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9e34a329a5f90c…

MALICIOUS

PDF

79.7 KB Created: 2021-01-17 19:14:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 00b670b73cf2f10352ad6eb117e48d93 SHA-1: 86c0eb1d2b45ebe3fd22e92ad5c47eaa3fe87a21 SHA-256: ea9e34a329a5f90cfe59c925f4e686da2eec676f7899565b398960e671651702
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure, likely leveraging a technique such as spearphishing attachment to deliver the malicious document.

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://trafftec.ru/123?utm_term=benvolio+character+traits+with+quotes PDF link annotation
    • https://cdn.sqhk.co/bozadukopufu/iUhahiq/graphic_design_portfolio_template.pdfIn PDF document text
    • https://site-1216718.mozfiles.com/files/1216718/odisha_song_video.pdfIn PDF document text
    • https://site-1177587.mozfiles.com/files/1177587/veretoxujotoxapoporabom.pdfIn PDF document text
    • https://site-1168114.mozfiles.com/files/1168114/viwusafivozifa.pdfIn PDF document text
    • https://cdn.sqhk.co/fogobewataja/jbhKnif/lodobebulorabarobenovex.pdfIn PDF document text
    • https://site-1172117.mozfiles.com/files/1172117/91489979030.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/gjiawjh/wordscapes_level_855.pdfIn PDF document text
    • https://site-1177706.mozfiles.com/files/1177706/wesivesojiteruvopewod.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/dlhdgic/front_license_plate_in_california.pdfIn PDF document text
    • https://site-1166042.mozfiles.com/files/1166042/79345113605.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fotafufoka.epizy.com/relabifuvererez.pdfIn PDF document text
    • http://zelixedamaxux.rf.gd/xediwen.pdfIn PDF document text
    • http://zuxekesimulir.epizy.com/32850695869.pdfIn PDF document text
    • http://surafupomef.epizy.com/woparisaxijexifenikawa.pdfIn PDF document text
    • http://muxolisakij.epizy.com/mixed_addition_and_subtraction_within_20_worksheets.pdfIn PDF document text
    • http://suvumudupese.epizy.com/tibixigoduxutaf.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_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 5212 bytes
SHA-256: 1f258f2a490d5aec8c970586d2fb61b6ad747f8fd3cdce3262f40aff7efdccea
font_01_sfnt_off00010cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 10800 bytes
SHA-256: 1ad94ebe5a17ff8e46d1f792f5c6228841ec6a31a16fdfb075c3fbb311867ba8

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