Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35dcedd79440d54…

MALICIOUS

PDF

53.6 KB Created: 2020-10-18 09:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b8423bfa90875f78a5fcd569c3a41500 SHA-1: 1f5e9d64441a1b9cd783d02dbb4243a2aaa62c01 SHA-256: f35dcedd79440d543fd41c84b6149642f8c8868a601d1f07034c5ec2d681672f
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=kawasaki+z500+fiche+technique In PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/gijimosoleneziz_vaduzuve_jebobodu_tezuvikufuba.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/sixatuzatena.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376629/normal_5f8a883142496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379370/normal_5f8afb6f4a722.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5f8b697dc8ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f87418819f0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/kagulimimuwebabufep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0826/4862/files/nidusunosovexor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/96159055487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7934/6592/files/elsword_build_elesis_crimson_avenger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4385/5777/files/3425562462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2703/6322/files/friendly_numbers_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/hum_saath_saath_hain_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3884/6359/files/erv_reisercktrittsversicherung_schadensmeldung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1687/8242/files/foganosawejabupij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9510/6750/files/risc_vs_cisc_architecture.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/mcdonald_free_wifi_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b57073-3182-470f-8104-28e7c071f1b7/gasizatixafijutosaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44b8e7c5-8d0d-4e9a-84fb-ea197f235ed5/pibunupifixoxozam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4abbbe1-b4a8-4e05-9757-9f83340e39d3/62552919156.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_off00009345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9345 5408 bytes
SHA-256: 816416503030b644f80cddc0bb1001935299d690b4f34e17d35bf3ab54c3bb82
font_01_sfnt_off0000a5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C3 10476 bytes
SHA-256: 256ea2e1792ab818c23fc88fb2f2342a640b20396781cd6c06bbec92307f15df

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