Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e99f2cb05e71b2…

MALICIOUS

PDF

84.6 KB Created: 2021-02-24 03:05:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 92f7e37e88d77c20acc706b0d41fba02 SHA-1: d49ae422020e0d1fb65444ed109058c8016eda69 SHA-256: 54e99f2cb05e71b2bc2665c6650beaf519876d4c6badc78cb149badc4360c761
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a link farm and a phishing attempt, with a high ML score and ClamAV detection confirming maliciousness. The embedded URL points to a domain associated with a "stealth cam command not sending pictures" lure, suggesting a phishing or social engineering attack. Although no scripts were explicitly extracted, the PDF structure and URL suggest it's designed to redirect users to malicious content.

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://bologen.ru/123?utm_term=stealth+cam+command+not+sending+pictures PDF link annotation
    • https://cdn.sqhk.co/zubavagi/lngfgdk/sapar.pdfIn PDF document text
    • https://cdn.sqhk.co/desixurate/iphghbK/sitosuvupopowolini.pdfIn PDF document text
    • http://lulezuzebat.22web.org/lejixugebi.pdfIn PDF document text
    • https://cdn.sqhk.co/zenokosix/ibXigsK/xfinity_stream_app_roku_sorry_something_went_wrong.pdfIn PDF document text
    • https://cdn.sqhk.co/rukububibon/Eshfgij/avengers_x_male_reader_angst.pdfIn PDF document text
    • http://metagopu.22web.org/10967243802.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/pisedij/72970966238.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/what_does_the_new_wine_represent_in_the_bible.pdfIn PDF document text
    • http://bakilipos.epizy.com/ahci_vs_raid_ssd_performance.pdfIn PDF document text
    • http://mopezit.epizy.com/91310053418.pdfIn PDF document text
    • http://zatojuwetowoj.rf.gd/67399660406.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/book_design_template.pdfIn PDF document text
    • http://wikatamuk.rf.gd/nirabakop.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_off00010d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D66 5592 bytes
SHA-256: 2b32e5dad364d7ed3bdfa1247812597ced1ffc688e180d3a84dd30477df0ee53
font_01_sfnt_off00012039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12039 10928 bytes
SHA-256: ed81b45aa7b40e39ca577c6b434dadae0bf38ab5871e428fc3d8c81bab4466d0

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