Malicious PDF — malware analysis report

Static analysis result for SHA-256 055d6e8392461766…

MALICIOUS

PDF

76.3 KB Created: 2021-04-03 18:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 001725ca6d39171e2451d321c6c68b20 SHA-1: c73f3aacf9c86a01349bb2a6706800524a4756ba SHA-256: 055d6e8392461766ef29edac447768d7c1cecab4f5a72c93c2beef7f624d3f48
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, with a high ML score and ClamAV detection as a phishing trojan. The embedded URL, 'https://golowaki.ru/wix?keyword=usanetwork%252Factivate+nbc+roku+tv', is likely the primary lure. The document body, though heavily obfuscated, contains text related to 'Usanetwork/activate nbc roku tv', suggesting a pretext for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=usanetwork%252Factivate+nbc+roku+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420237/normal_60399b2852cd3.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/584c389.pdfIn PDF document text
    • http://yourcy.com/procreate_tutorial_without_apple_pencilielvn.pdfIn PDF document text
    • http://notdull-eng.online/english_conversation_esl_topicsh74qy.pdfIn PDF document text
    • https://xajekedifa.weebly.com/uploads/1/3/4/4/134469171/xuketire.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376357/normal_5ff474f182240.pdfIn PDF document text
    • http://servicesforsupport.com/82151380791xwiy4.pdfIn PDF document text
    • https://xokaxopo.weebly.com/uploads/1/3/2/3/132302824/e5eaa7111415aa.pdfIn PDF document text
    • http://xunidar.iblogger.org/67508803282.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/tudox.pdfIn PDF document text
    • http://naxenavuk.22web.org/pelufuvabalajixe.pdfIn PDF document text
    • https://vugosolisaxude.weebly.com/uploads/1/3/2/8/132814967/sozukujuzilukekumigu.pdfIn PDF document text
    • http://smotrikino.fun/65656260137wsmq1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483361/normal_602d82436ec75.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/20d1332f-37ca-4fe8-ba14-96f60449c8fe/motorola_sb6120_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87245e8-bbca-4c6c-b9ef-895a685eacfb/25754268632.pdfIn PDF document text
    • http://tatonokewa.epizy.com/are_golden_lion_tamarins_dangerous.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e542e5b-c5b3-496c-9f6a-5fccf702033f/what_is_the_healthiest_frozen_dinners.pdfIn PDF document text
    • http://gagolabirej.atwebpages.com/nokutapanedupisatevikugab.pdfIn PDF document text
    • http://bexalaxawuwe.rf.gd/figolemup.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_off0000ece8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE8 5144 bytes
SHA-256: adb98979d3eecf33b5590437de95fa3ad7af4c81de9514c6de016cb7f4683ccd
font_01_sfnt_off0000fea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA0 11156 bytes
SHA-256: 5f848a6281c52ba44c58d90a40e7c94dc419eab29e7e857a170df27f97ce9cc0

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