Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf15a26fc2ed268d…

MALICIOUS

PDF

41.0 KB Created: 2020-11-06 17:09:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4dc469b998ebc42bf041b8716ab2f6e6 SHA-1: d7bced21e6bb2de21ca867d9f87dfc7dd12ab671 SHA-256: cf15a26fc2ed268d1cad35c11042e00efc14a3dd9f19d3e531617850760d1e7c
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://traffking.ru/123?keyword=bloons+td+battles+hacks+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f905b1b35f84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_5f9e55b1caf95.pdfIn PDF document text
    • https://relotozaku.weebly.com/uploads/1/3/4/2/134266658/zitamivuxibo.pdfIn PDF document text
    • https://sazalilo.weebly.com/uploads/1/3/4/5/134592982/tivuzepokepeserad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5f88465812e99.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/2310212.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/sivovawi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://nelokurebo.files.wordpress.com/2020/11/ek_hasina_thi_instrumental_mp3_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ce09d6-ff5f-4863-9743-31ddfde02b8c/angelarium_oracle_of_emanations_card.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/seekers_notes_hidden_mystery_free_rubies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770f4c46-9215-4ebd-a08c-36031d7fc3ae/21684441898.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_off00005f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 5316 bytes
SHA-256: d7cf3be1511593d7f90d761fee71224278cd90cf90fdd796e3f5accceed197f0
font_01_sfnt_off00007154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7154 11148 bytes
SHA-256: fad7f39b443d61f08c3441de18f7d26b84f65efa4d23e35231f4dbe498751825