Malicious PDF — malware analysis report

Static analysis result for SHA-256 e87e6f68885c95eb…

MALICIOUS

PDF

48.5 KB Created: 2020-10-04 12:59:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 070375263ac95caa233f17a717571be3 SHA-1: 112613bb6aa6b3a33f52628890c116df2d85e489 SHA-256: e87e6f68885c95ebf174f282a66eafa5a7c0dcdb94dedadd4708d938bdf36f2f
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm designed to obscure the ultimate destination, which is a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/pify?keyword=tammy+van+zant+husband In PDF document text
    • http://files.ihca-es.com/uploads/1/3/0/7/130774981/zedejovonimuvi.pdfIn PDF document text
    • http://files.samjadelaide.com/uploads/1/3/0/7/130739621/gelinim.pdfIn PDF document text
    • http://senafoki.credit-hours.com/uploads/1/3/0/8/130814110/jepinaki_pazaxoj_lowun.pdfIn PDF document text
    • http://files.gemmablack.com/uploads/1/3/0/8/130814516/2521457.pdfIn PDF document text
    • http://files.attercliffepharmacydirect.com/uploads/1/3/0/7/130775232/defuwo.pdfIn PDF document text
    • http://files.partyofcate.com/uploads/1/3/1/3/131383493/3012793.pdfIn PDF document text
    • https://site-1043494.mozfiles.com/files/1043494/35960405632.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/46945705658.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e49c4be-130a-4a40-a82c-5811ee2d0aba/kibonevokonutubatoriz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/200cef76-e0ee-471d-bd87-9a27863b31ba/93912179440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b842efe1-f1d9-4e0d-8c9e-145f61906021/97757251789.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_off00007fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 5236 bytes
SHA-256: 9d66bb93d8ea84c22e4f874166c63b46e03402af0e16d5e8a8b5b8cccbdc643d
font_01_sfnt_off000091a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A1 10744 bytes
SHA-256: eac7ebacdb3c70954baa62c8cf98ec2533789dc3283174093e945aebfcce5ea4

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