Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f3cdce17ddeb22…

MALICIOUS

PDF

48.9 KB Created: 2020-10-26 09:43:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b290557db7ba8f86ef0a8e8faf2c184b SHA-1: 9541f6c0103ebc132862c1c3bbd5f7edf8eb45be SHA-256: a7f3cdce17ddeb22ac940626ac680e93539a65488f2f53c12bdbc1fe93d9a70a
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://ggtraff.ru/123?keyword=torque+pro+apk+windows+10 In PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/mawumalurinogol_burevejegojefib_rikurakasavud_pabagezinofi.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/wuzuwa_kagivasavex_gopogufagu_gululon.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/1306428.pdfIn PDF document text
    • https://vemetufubejukat.weebly.com/uploads/1/3/4/3/134367776/a6ae2a2b.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/1/0436/7309/2246/files/star_trac_treadmill_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8902/5942/files/wallhack_free_fire_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3772/6622/files/ninipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5044/1141/files/rusazumulebirevagolexuvum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90602c0c-da80-4a0c-abd5-e77bb18178dd/76243792427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c83ab75-b53a-444c-9633-b43bc6550685/47612137343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ca0b2e-8c8d-4eaa-bf1d-c1a0a91cc57b/12575811953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64dc7030-59bf-4971-9576-3b781f578b57/7020390142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f161b00-cab4-4260-92ae-65c8950eace7/44869285107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c40c42-7123-45f2-b319-9a6f731a26b9/mejosugaxoxudilar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee1f92b-9823-4742-8645-861dacc75def/33157682292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a49486-db9b-4229-acff-e1938ff07804/7751157569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7927/9812/files/download_novel_sophismata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2754/9338/files/wichita_falls_newspaper_death_notices.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7194/6919/files/43811865423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4142/8918/files/tuxurubivamujabopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8023/5193/files/security_manual_template_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/ankylosing_spondylitis_treatment_nice_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/49055669602.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_off00007f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F01 5348 bytes
SHA-256: 71737a5879cfaa6a4dc98890504b30288d553c6d4029606a968bfae6aa508a7c
font_01_sfnt_off00009158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9158 10656 bytes
SHA-256: 7097fb818c0a52b4507560f173c11af00c95fa2b3235dbd2f98bc507bd36b75b