Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa42655525d11ba…

MALICIOUS

PDF

41.1 KB Created: 2020-10-30 06:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 8d8a57e22f02c34addd7dd90d56d2665 SHA-1: 253b84d1fc6d4e73dea4719ee91c466af9dde98b SHA-256: efa42655525d11baaaa5742f41347c5a3353b02a5a0e3e127e05dbe32545ea79
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/wb?keyword=human%20molecular%20genetics%20peter%20sudbery%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f9286d5f00bd.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/5533995.pdfIn PDF document text
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/gemetirabalupugela.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/903439.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/5617392.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/2714978.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8554420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f87d636806d5.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/pobenirabexu.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006020.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006020.bin)
    • https://cdn.shopify.com/s/files/1/0502/0617/9504/files/wutelafalabemifusikemup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2416/9114/files/2017_volvo_xc90_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8017/1174/files/67715979968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37bb8617-4eaf-460f-836b-b8ed88e9c9c0/zubilemeritijivasedevofib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3b6ed43-9641-43dc-ad11-84b31165137a/8797955262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2156/5596/files/douchebag_life_2_hacked_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0487/7261/2262/files/at95e_vs_at-vm95e.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 extracted file (font_00_sfnt_off00006020.bin)

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_off00006020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 5680 bytes
SHA-256: 533f9320edabc86b7f33729afa69fc0ad988be6f1d05e4fa86039f772e8aff32
font_01_sfnt_off00007353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7353 10524 bytes
SHA-256: c983ea483eaa75cd8d980a3601034707f049538aa787442e5f78d7be8e31ad8e

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