Malicious PDF — malware analysis report

Static analysis result for SHA-256 50823b0571f2067d…

MALICIOUS

PDF

46.4 KB Created: 2020-11-03 13:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b95c713b666dddcde7c15b151f3b8da5 SHA-1: 8ecb28fb5eb107657e55c69e94144bea881a4e5f SHA-256: 50823b0571f2067dbd712395f995de5a423ed0aca61c291fc1ed16ddf98730a1
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://ggtraff.ru/aws?keyword=com+mini+zombies+mod+apk In PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/mupogeni.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/b2d64c848.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/a92fe1.pdfIn PDF document text
    • https://pirivelel.weebly.com/uploads/1/3/4/5/134505874/bobimiveniled-jaxazusasiwira-fofuk.pdfIn PDF document text
    • https://buziratefe.weebly.com/uploads/1/3/4/3/134354065/dakizakowanamiv.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/ferubijuwubeb_pujinota_mevibafegipono_likos.pdfIn PDF document text
    • https://dowamiwimeguv.weebly.com/uploads/1/3/0/7/130775936/f0410350c555e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/e63a859f-88c6-431e-9d44-65f561c4660c/8592525720.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3548/2006/files/how_to_make_a_lead_in_minecraft_without_slime.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/reactivity_of_halide_ions_lab_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cd4894-a0be-4646-8c6c-5b6d8759ef85/lutulafepijufami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/vutowelodebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bba9a8d-292a-4fc1-9404-c4e58ecb675b/3514912662.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/moletatinenezinapejun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457cbdb0-2f64-4468-9e6a-fc750956f3ce/86535494734.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 4960 bytes
SHA-256: b00f064777350eab7787edebef51788af447ab74f6834c24dcb49c139585fb49
font_01_sfnt_off00007172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7172 1944 bytes
SHA-256: 37f59432fb86c80b7238965338e082d5c77dbfbd5d142cfd2887d30a573b82ae
font_02_sfnt_off00007ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC0 10256 bytes
SHA-256: 1de74fa7797f7482e579b9a82c2fc70eb31b6d10a92ad72af780232c42fcceac
font_03_sfnt_off00009deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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