Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25a4f1c840af6c1…

MALICIOUS

PDF

47.7 KB Created: 2020-10-09 14:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c81278362c1787768ba604a0316e16cf SHA-1: 2fba53f11875e149af59512e393a3faad94bfbd0 SHA-256: f25a4f1c840af6c18fa624582d57d26806cd7ace578ed6b75f64c7f30933d429
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/strik?keyword=rogers+park+lubbock+texas In PDF document text
    • https://site-1038771.mozfiles.com/files/1038771/14056155756.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/bupadisibisewigon.pdfIn PDF document text
    • https://site-1039991.mozfiles.com/files/1039991/1603163941.pdfIn PDF document text
    • https://site-1043653.mozfiles.com/files/1043653/33388060142.pdfIn PDF document text
    • http://files.martinegutierrez.com/uploads/1/3/0/7/130775825/5affea98f115c1.pdfIn PDF document text
    • http://kolufup.steamychef.com/uploads/1/3/0/7/130739732/wawetenejajonifanow.pdfIn PDF document text
    • http://files.dreamscapesiberians.com/uploads/1/3/1/3/131398423/disuruzow.pdfIn PDF document text
    • http://pesiboj.laplatanursinghome.com/uploads/1/3/2/7/132712109/jumagajedalu.pdfIn PDF document text
    • http://rileno.anteupphotography.co.uk/uploads/1/3/1/0/131070109/gitunaviruluk.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/033d9d24-d539-443c-ba55-071735c31a48/52299952525.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5934aa59-70e0-446e-b08a-64739d37b379/44102455066.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/584a5dda-0dc3-4245-a9d4-6bf1d0510c7f/xavevizigelilar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d795f43-4954-45cd-9314-fadcfe5d4506/jusepegevizenovevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcf2a32a-2f26-47ed-9811-57c58864ee99/19172662707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ede4753c-0a44-4a44-908b-ee70ad2b0689/88526424113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4536591-0930-4f0c-9180-0837d583ab2a/xumazu.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_off0000723e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723E 5380 bytes
SHA-256: 55ede8e0342d2183aad5f4abd7af10784132cea2539eac7c937fdf9207c11971
font_01_sfnt_off000084aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AA 14524 bytes
SHA-256: 60bab58e7f8ca0b0a10e57f6bf48c36f301685db60ed6a419c05ee15d5267c5c

Open this report in the interactive analyzer, or submit your own file for analysis.