Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca89fd870969d49…

MALICIOUS

PDF

79.5 KB Created: 2021-03-05 18:53:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7ecee3d57f199736bce21dd41e6eb1b7 SHA-1: 840b0f3e695f7addd54aeb12c20228550e00e53c SHA-256: 7ca89fd870969d498e46acc01407683964964e92076ace248f51a134a7660ed2
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 or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

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://jacksth.ru/wix?keyword=chilton+motorcycle+repair+manuals PDF link annotation
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/3580225.pdfIn PDF document text
    • https://pitajuzijos.weebly.com/uploads/1/3/4/8/134885257/df247b78c274841.pdfIn PDF document text
    • https://fazajamol.weebly.com/uploads/1/3/2/7/132740605/gaxadobopunewo-kumubovekol-mafivalaluso-lebiv.pdfIn PDF document text
    • http://bbflowers.net/whats_happening_outside_the_white_house_right_now475ed.pdfIn PDF document text
    • https://simefaburiso.weebly.com/uploads/1/3/0/8/130814859/9765272.pdfIn PDF document text
    • https://gatiwisukebemo.weebly.com/uploads/1/3/1/4/131438587/nuwivolifuwijomadog.pdfIn PDF document text
    • https://jevoweli.weebly.com/uploads/1/3/5/9/135958856/9186466.pdfIn PDF document text
    • http://endi-itali.space/28268885665q1q8y.pdfIn PDF document text
    • http://famozosivupiwij.sportsontheweb.net/2002_yamaha_kodiak_400_4x4_for_sale.pdfIn PDF document text
    • http://udilische.club/pathogenesis_of_microorganismslxjrt.pdfIn PDF document text
    • https://zekabijixakosu.weebly.com/uploads/1/3/0/8/130813896/3a6986.pdfIn PDF document text
    • http://petersikdar.com/kesibuwafbvj1h.pdfIn PDF document text
    • https://kukavijeri.weebly.com/uploads/1/3/3/9/133997324/f785935c6b1a8f7.pdfIn PDF document text
    • http://shoop-ft.ru/lupolukudabuwivedifaniuxfnu.pdfIn PDF document text
    • http://nitapida.mywebcommunity.org/100_000_dollar_business_ideas.pdfIn PDF document text
    • https://lisufijefe.weebly.com/uploads/1/3/2/7/132740260/8124966.pdfIn PDF document text
    • http://reduslim-official.website/bolotajiginalelab7j71g.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
    • https://s3.amazonaws.com/jazuravazaguz/zereguxilolimufakeme.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/mersal_full_hd_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/sulinegukaferugosa.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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 5180 bytes
SHA-256: 704e2dc57993d81363ddbc98e64c0b7d637162d05e9550ccdfe06f5ea67d96b3
font_01_sfnt_off0000fe99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE99 10544 bytes
SHA-256: 3c55608fd4a3bc1e30b1198aa6264caacf59f48d3ad1796394f2f51fcc612fd8
font_02_sfnt_off000122a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A1 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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