Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead1547ee07d564e…

MALICIOUS

PDF

74.9 KB Created: 2020-11-17 18:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b950b6d27558babdfb3b20e1ce3cbfca SHA-1: 9d48ac0445ed08a9cd44be2d8b2a6260cf7ba011 SHA-256: ead1547ee07d564e858f5bdcc6dd3b90b0a014c4bf757508ca492cd79ae48526
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed to redirect users to various external sites. The document body, though heavily obfuscated, contains a reference to 'Craigslist in hawaii', suggesting a phishing or scam lure. The numerous embedded URLs, many hosted on disposable domains like weebly.com, indicate an attempt to distribute malicious content or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=craigslist+in+hawaii PDF link annotation
    • https://xabopefasuliwik.weebly.com/uploads/1/3/4/4/134445681/1228205.pdfIn PDF document text
    • https://vutifiruva.weebly.com/uploads/1/3/4/5/134595151/9908660.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/negasezufit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f9a2968ed012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450517/normal_5faa3d085c1cc.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/kanunogirejarari.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5fa9dbf4c9f5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_5fb25ee19a723.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://reluxepeguru.weebly.com/uploads/1/3/4/3/134363030/lakasimovapa_rifafa_kexowokidu.pdfIn PDF document text
    • https://tarebizadutobi.weebly.com/uploads/1/3/4/3/134310067/poxozurixiru-rovijopobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_5fa9a20b39b65.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/setaxilitozuko/gear_s3_samsung_galaxy_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/32481070919.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_off0000db1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1F 4620 bytes
SHA-256: c0fa6180b603d57ad0ee59e3679cd70578fee5541c8833d3ff8f834bc41df71e
font_01_sfnt_off0000eac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 10612 bytes
SHA-256: 501c6c1789a894b397175ce0d7384d08b450139370dd7fffce38302958655a70
font_02_sfnt_off00010f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F11 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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