Malicious PDF — malware analysis report

Static analysis result for SHA-256 54892f2bc7d5fe82…

MALICIOUS

PDF

69.6 KB Created: 2021-02-17 04:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 04cb6c97ebe62787586eb8a3d5defb12 SHA-1: 27a986350c3ea5ab610f6257183c4033afb3c11a SHA-256: 54892f2bc7d5fe82b346f49ea9ebff0c4b874263d21a01cef22bf24040dddfab
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with one prominent URL suggesting a lure related to 'the andromeda strain miniseries' to direct users to potentially malicious sites. The PDF structure also indicates it functions as a link farm on disposable hosting, further supporting a phishing or malware distribution attack pattern.

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://leonvi.ru/123?utm_term=where+to+watch+the+andromeda+strain+miniseries PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497109/normal_5fdce20388025.pdfIn PDF document text
    • http://positarinirib.22web.org/wurezopevameven.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448116/normal_60080b1c442a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477886/normal_5fc9ed9e6a283.pdfIn PDF document text
    • http://guwajokuxo.22web.org/bosokavakipubokave.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/7Sewwd7/live_stream_fox_news_debate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497688/normal_5fe922a4bc7a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375889/normal_6000a6c39d6c6.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/bgjEgd4/58315079700.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498882/normal_60067966c940f.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/jg8ieig/lebara_australia_app_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/tDjfjgs/63990495325.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temekem.epizy.com/shimano_altus_gears_manual.pdfIn PDF document text
    • http://pejatopofir.rf.gd/goals_and_objectives_template.pdfIn PDF document text
    • http://momobolabewonu.epizy.com/zaxisedakoxut.pdfIn PDF document text
    • http://lugopupi.rf.gd/repo_gross_up_balance_sheet.pdfIn PDF document text
    • http://fubolorira.epizy.com/dulafojutokepibav.pdfIn PDF document text
    • http://lutepebenunara.rf.gd/95522909207.pdfIn PDF document text
    • http://nilixedenoxim.epizy.com/28454896112.pdfIn PDF document text
    • http://zubutavobidu.rf.gd/mckamey_manor_full_waiver.pdfIn PDF document text
    • http://fawujuvuz.epizy.com/repamunijunilate.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_off0000d0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A0 5252 bytes
SHA-256: 605b533c4140829e414529f731b52ed69af64087bab9baea5b34ec2947332b6a
font_01_sfnt_off0000e267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE267 11656 bytes
SHA-256: d5f876df67ccd7f0f7acd1d95709c884aaac2e27845b21c28c2a35de5ca533b9

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