Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee46361677acce6…

MALICIOUS

PDF

76.8 KB Created: 2021-03-17 21:52:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d7f667007f43c5485e2b907d8bec179d SHA-1: 207d2fc5b6f659074908a8aaab1bd379806198d9 SHA-256: dee46361677acce6a6c72237b92a9be62e0194db55fb7b9676ab5fd1963d6fe3
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily corrupted, contains text related to installing Windows 7, likely a lure to encourage clicks on the embedded URLs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://pelibifir.ru/strik?utm_term=how+to+install+windows+7+from+usb+pen+drive+in+lenovo+laptop PDF link annotation
    • https://cdn.sqhk.co/bagadogod/YbiarbK/godfather_theme_guitar_sheet_music.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fdc5f18b96c1.pdfIn PDF document text
    • http://lnstagram-helping.live/yamaha_moto_4_value56uk3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413973/normal_5ff514d494168.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/ijjhd9B/bike_race_today_near_me.pdfIn PDF document text
    • https://kowagazobavov.weebly.com/uploads/1/3/0/8/130874359/6935210.pdfIn PDF document text
    • https://zalidumi.weebly.com/uploads/1/3/5/3/135351231/1421550.pdfIn PDF document text
    • https://pefopurez.weebly.com/uploads/1/3/4/3/134375846/gelewajubijukavu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_601fcea6ad934.pdfIn PDF document text
    • https://xuropowupenuba.weebly.com/uploads/1/3/0/8/130813979/7410317.pdfIn PDF document text
    • http://kostlike.site/89224075622j269y.pdfIn PDF document text
    • https://riligasiguvenu.weebly.com/uploads/1/3/5/3/135392009/zifojaso-xojikizo-kobulumirurujux-satujenuli.pdfIn PDF document text
    • https://wunobenera.weebly.com/uploads/1/3/4/8/134887230/jixeromejulopi_mumolenon_fakudoni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450250/normal_602b59c63a1de.pdfIn PDF document text
    • https://vojizozovogimum.weebly.com/uploads/1/3/0/7/130740342/398330.pdfIn PDF document text
    • https://vivorewipaxuje.weebly.com/uploads/1/3/4/3/134365477/dokedikoxefenufikopa.pdfIn PDF document text
    • https://cdn.sqhk.co/kikepedu/ihB3icr/36356131407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 5520 bytes
SHA-256: 9fb581bed8c12d72288de0f2b55a23325c9b104ea8fc0637be1d848fa894b488
font_01_sfnt_off00010181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 10664 bytes
SHA-256: 1dce40af7ec452d6b969bcb50ea89fcfb936ed25dcce9b5dfd742522caa66e4b

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