Malicious PDF — malware analysis report

Static analysis result for SHA-256 26224835b82889e3…

MALICIOUS

PDF

68.6 KB Created: 2020-12-25 12:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4b25bbdd3f01355f2b8daa7361a810e8 SHA-1: bf7a90b40060570c542119a3cb67e252649d7c3d SHA-256: 26224835b82889e3ff3d264c6f1e8077509bad9c887f74c413762232a3764bf4
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document exhibits characteristics of a phishing or scam lure, indicated by heuristics flagging it as a fake invoice and a callback lure. It contains a mass of external links, with a primary suspicious URL pointing to a redirector. The ML classifier strongly identified this PDF as malicious, supporting the conclusion that it is designed to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafffe.ru/strik?utm_term=recorder+maricopa+county PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402507/normal_5fdfd001efab5.pdfIn PDF document text
    • https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/c228c4aabec866.pdfIn PDF document text
    • https://joweralifaj.weebly.com/uploads/1/3/4/3/134350132/5672436.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/g6dhfDl/nividel.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/eghIvhi/81748655231.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485309/normal_5fe2484cd9fdd.pdfIn PDF document text
    • https://ruxibero.weebly.com/uploads/1/3/4/4/134403554/lezipuxa-lafozenokunaz-wukerufa.pdfIn PDF document text
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/08e24b08a.pdfIn PDF document text
    • https://tojuseviru.weebly.com/uploads/1/3/4/5/134513446/c4d72a43f71.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/d675ad0a-3dc5-41d0-9ed9-77ce7e6c4a97/psicologia_anormal_david_barlow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1edbc844-8116-49f7-a666-db99b7a54a74/fezibukoso.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/31226037235.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/answers_to_daily_jumble_solver.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 5116 bytes
SHA-256: 5cccdb3e8b57726e9559876c1e85f01f95d26f66b986fc2781c28c5b72790cda
font_01_sfnt_off0000e18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18D 10664 bytes
SHA-256: 8f7b40339d776d9e035203c414358b84dfb24df81c386e2a5ba5ebc3c3e3c02e

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