Malicious PDF — malware analysis report

Static analysis result for SHA-256 90520fafb20b04b2…

MALICIOUS

PDF

76.2 KB Created: 2021-02-24 18:56:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4de3d4007551e4cd7b395500f2d6cf53 SHA-1: 2b61dfb645e9111439dd992e96d22245a1cbadc1 SHA-256: 90520fafb20b04b2a302b4bdeb35abf5ba3b0258298a2b4e83f217df77519e79
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The embedded URL 'https://jottigo.ru/wix?keyword=dream+machine+auto+time+set+instructions' is the primary lure, suggesting a phishing or scam attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

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/wix?keyword=dream+machine+auto+time+set+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403676/normal_5fe57e234b9e5.pdfIn PDF document text
    • https://zepusarogetiki.weebly.com/uploads/1/3/4/6/134687077/rodumojetesobiwaxid.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/xupuzevisi-gufudegalixane.pdfIn PDF document text
    • http://natusab.22web.org/automatic_transmission_fluid_sds_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_601d239520023.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/igmp_snooping_configuration_guide.pdfIn PDF document text
    • http://pobopel.iblogger.org/34425104730.pdfIn PDF document text
    • http://mepowubezuku.iblogger.org/24091448287.pdfIn PDF document text
    • https://bikewodeganesu.weebly.com/uploads/1/3/4/5/134596115/d0a66a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372076/normal_6028ea6d83dfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_6029ff246db21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480402/normal_602d6f2d3c4e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_6036065af4217.pdfIn PDF document text
    • http://rasezinetoge.iblogger.org/nurivar.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/nojemi/aadhaar_update_form_for_mobile_number.pdfIn PDF document text
    • http://vevemelimo.epizy.com/doctor_sleep_trailer_reaction.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/sweater_bengali_movie_song_webmusic._in.pdfIn PDF document text
    • http://kasamirekajitid.epizy.com/89111184396.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/zususuzitowa.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/18835635185.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_off0000ee86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE86 5008 bytes
SHA-256: 9bdf7cd1d92191dfabbf43ebe5d58b3af20b797882fe8ba2a201f45823af77a0
font_01_sfnt_off0000ff63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF63 10488 bytes
SHA-256: 1fefd0a123d2a0d66b9a903a9a2d5a1e3f784c18bf3d7c507f9b9f5748d2d5e8