Malicious PDF — malware analysis report

Static analysis result for SHA-256 f43d19f73bbeca37…

MALICIOUS

PDF

40.9 KB Created: 2020-11-04 21:01:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: fe30b3e785786df6fc6cf591bd8c1fb3 SHA-1: c777b822ab60492ec8b9ab10f15c3493a80dd4bb SHA-256: f43d19f73bbeca37a3407ba2aaf3229571dda76ad4596bc14f182b9e9694444b
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://ttraff.me/123?keyword=imperialism+worksheets+high+school In PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/gokifuko-dagumatotuxe-jukewutubalom.pdfIn PDF document text
    • https://lanigitekepag.weebly.com/uploads/1/3/4/3/134395773/rogiwerinetofom_likotizawu_jinegewatozin.pdfIn PDF document text
    • https://gugabezari.weebly.com/uploads/1/3/4/5/134577353/bebdada70a.pdfIn PDF document text
    • https://vidojibirulon.weebly.com/uploads/1/3/1/0/131070792/3e57cfba0.pdfIn PDF document text
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/nibexisab_sabesoxe.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/pafinuv.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/f1981e8e-3495-4159-931e-2af1cde276f6/rockstar_720p_hub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98deb43a-fdf3-4f5e-8d48-1b0338ec437c/10790159110.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/allegheny_county_recorder_of_deeds_pa_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/atmega88pa_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d100da0-b480-49bf-af28-0401afb4552d/super_cheats_san_andreas_ps2.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/16617071739.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_off00006141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 5440 bytes
SHA-256: f54df721d500f24acf743efac7d4d52b2507df8786d5b3155f97cf0b553fd563
font_01_sfnt_off000073a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A8 10368 bytes
SHA-256: 5af0895698248b21c8ad935bdef11465d150e611574315c2eb9446f5502b777d