Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bfcc119270c32b…

MALICIOUS

PDF

41.9 KB Created: 2020-10-04 16:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 26c912e3b6a30fb52969dd359448a8b0 SHA-1: 3e96d91eff60ed0d9cb21fb87e02da2df23b3be3 SHA-256: 00bfcc119270c32bfff3eb60686348a2cc5e10b3887c4475d678cc7df2dd1f5b
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to disposable hosting and are associated with redirector infrastructure. One prominent URL, https://cctraff.ru/strik?keyword=funeral+service+template+australia, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to funeral services, suggesting a lure to entice users to click on these malicious links.

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://cctraff.ru/strik?keyword=funeral+service+template+australia In PDF document text
    • http://zedasi.boydrobe.com/uploads/1/3/2/6/132683252/8b9f5eb43d960e2.pdfIn PDF document text
    • http://files.richardpettittart.com/uploads/1/3/1/3/131380397/fewulo-siwimiru.pdfIn PDF document text
    • http://gazed.larklandsroofing.co.uk/uploads/1/3/1/3/131383483/gapuxovujoz.pdfIn PDF document text
    • https://site-1040363.mozfiles.com/files/1040363/43625450272.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/87106263073.pdfIn PDF document text
    • https://site-1038840.mozfiles.com/files/1038840/towode.pdfIn PDF document text
    • https://site-1037188.mozfiles.com/files/1037188/97389227835.pdfIn PDF document text
    • https://site-1039162.mozfiles.com/files/1039162/66040519369.pdfIn PDF document text
    • http://files.cherieclarkmoore.com/uploads/1/3/0/9/130968976/2ae1f6c5dd9.pdfIn PDF document text
    • http://tadudu.dogsfoodandbooze.com/uploads/1/3/1/3/131383721/2717479.pdfIn PDF document text
    • http://files.brentsawicki.com/uploads/1/3/1/8/131856276/6712832.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/da467ad7-8e25-4a94-8535-f4190f1a30f5/figuwagi.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_off00006700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 5096 bytes
SHA-256: 968cbd7c040028e227f5a45f687266ac57b1a3494b9c52385ced307eb38fc475
font_01_sfnt_off00007845.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7845 10272 bytes
SHA-256: 77150ed53df8629dcc46b2853d7413e177e76fa4bf952b9bd69f592bb79cfed8

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