Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f493cb4460edc7b…

MALICIOUS

PDF

71.6 KB Created: 2021-03-04 22:51:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ce6981af4b72ed5b0bbe44fa0386e2a5 SHA-1: d6b26cd69c38c5830730b525277363dd4a33c327 SHA-256: 5f493cb4460edc7b88ecf60b9531ac7263d035b1a43543aad9862aec0b8303fc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The primary URL, https://xezojetit.ru/123, is presented with a query parameter suggesting a search for troubleshooting phone hotspot issues, likely as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as phishing malware.

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://xezojetit.ru/123?utm_term=why+isn%2527t+my+phone+hotspot+connecting+to+my+laptop PDF link annotation
    • http://differencecheats.net/rotujutikufilewazij638ui.pdfIn PDF document text
    • http://detonic-hypertonie.website/37088131731q1sgq.pdfIn PDF document text
    • http://meblik.su/how_do_you_troubleshoot_a_whirlpool_dishwasherygsds.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/rmiciaR/narokogapoligob.pdfIn PDF document text
    • http://mybatut.store/bdo_lahn_guide_2018qs0ca.pdfIn PDF document text
    • http://astrohelp.space/nokilosobimitxfkxf.pdfIn PDF document text
    • http://acupofjacob.com/28924127253d7u2d.pdfIn PDF document text
    • http://profer-opt.ru/presentation_format_ideashs6z1.pdfIn PDF document text
    • http://semengergel.ru/98078988481dbooc.pdfIn PDF document text
    • https://cdn.sqhk.co/satofapo/WiiFTKi/loxofuraruzazim.pdfIn PDF document text
    • http://demask.space/3145402709923fbg.pdfIn PDF document text
    • http://tugidunamoz.22web.org/gunofapiputifit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/73db930d-f941-48a5-b6bc-3dff1c11e0ef/is_there_a_monthly_fee_for_a_hotspot.pdfIn PDF document text
    • http://wowulikuvej.rf.gd/furiously_happy_a_funny_book_about_horrible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b61595-ff14-4103-8822-c908ba524706/56583593681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4813b8b7-957d-4442-9d2a-0748e1227f1e/25253263593.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_off0000db90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB90 5400 bytes
SHA-256: 5e9617af18209e7685c3ef2448f40a352e5476c8202c489bd801741dc848e5a9
font_01_sfnt_off0000ede9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE9 10244 bytes
SHA-256: caa629ce353ad54523fdf9bd2128da52ae7a708b35eb49ad3b9ae4b377c45722

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