Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d43dce354367f3b…

MALICIOUS

PDF

147.3 KB Created: 2021-02-23 03:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b2fad9cc4fd98d00a34d4fc128f1b6f9 SHA-1: 36bf8ec7aa8344693b1988b48a56ab9e02d90926 SHA-256: 6d43dce354367f3bb015e681866a5ac95be325557cbffba1f6bfe219d7ebf7aa
134 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to redirect users to malicious sites. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses social engineering tactics to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=explosion+transparent+art PDF link annotation
    • https://cdn.sqhk.co/fekigimuzib/DmicjcZ/fefovekal.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/4777476.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/486a830e53017c.pdfIn PDF document text
    • https://cdn.sqhk.co/kerosumumato/ifCduhb/aafes_clothing_sales_pentagon.pdfIn PDF document text
    • http://tirudibemaj.22web.org/charley_pride_gospel_songs_free.pdfIn PDF document text
    • http://nojuror.22web.org/handball_score_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491169/normal_5fdd32066dbee.pdfIn PDF document text
    • http://zafufevede.iblogger.org/stokke_crib_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368488/normal_5fe6bed0990c5.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/jgigiic/paradise_island_tv_show_hgtv.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/jiNPjjr/80101534865.pdfIn PDF document text
    • https://fejaxipanegis.weebly.com/uploads/1/3/2/7/132712099/veperukap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451950/normal_5ff50bfb60780.pdfIn PDF document text
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/7152079.pdfIn PDF document text
    • https://xukotonaxi.weebly.com/uploads/1/3/1/4/131453431/xoxowufirojigi-detor-taboz-gavoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://delozaroj.epizy.com/3561262904.pdfIn PDF document text
    • http://maxafatuvapare.rf.gd/rumiwusutovenol.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/gallagher_premiership_team_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD55 4628 bytes
SHA-256: 1313591e7d3e4ce59067d8914e6b5a438de9a58730bef9aa965b85d03ff37a82
font_01_sfnt_off00020d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20D0D 10720 bytes
SHA-256: 3953c02311ec20d0090e96a6da05b9bffc11bf07afa661f85cca6ebe3007e668
font_02_sfnt_off000231b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x231B3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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