Malicious PDF — malware analysis report

Static analysis result for SHA-256 54c0def80939fd74…

MALICIOUS

PDF

47.4 KB Created: 2020-10-27 01:03:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d598fd50dd44b8579dea9f8d47242f7b SHA-1: 7faa011c899609824606aa989f21391598fdc064 SHA-256: 54c0def80939fd740c7f726c2eb6db821c799d75fbd147909f676574ecbe7dee
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/123?keyword=riot+shotgun+mods In PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/9678319.pdfIn PDF document text
    • https://nugemezan.weebly.com/uploads/1/3/4/3/134359438/2145551.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/d0d046d6c.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/cb233a8c6e.pdfIn PDF document text
    • https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/pezemolupu-murejat-vasebase-tulol.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/cf4d84f96f5.pdfIn PDF document text
    • https://melesosinipedo.weebly.com/uploads/1/3/4/4/134475371/26cf41d.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/5092761.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/gufesizakabezusokume.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/ec2a272b2e40.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/rorusugopa.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/sifuwatodomenad.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/kivaperemalo_rosorajuw_tunakusexaxixes_lobopexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00007ba2.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00007ba2.bin)
    • https://s3.amazonaws.com/panalipolifod/ap_grama_sachivalayam_notification_2019_freejobalert.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/politeness_theory_by_leech.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/7358549020.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/zikalevak.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/narugifugukiwinazenopun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd4110f-e256-4c9e-9b28-e1b4635b3bcd/buxofatu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe50510-66b0-4c86-b429-b50ce132a9c7/manga_guide_to_linear_algebra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4ebf39-9bb8-404a-8051-7fe1ec43bf58/jobupujap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e026b2bc-2490-45b1-b2d0-3909e6e34959/wosisiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/751029c3-91d9-4765-946f-b13457ebe8f4/lasurif.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_off00007ba2.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA2 4908 bytes
SHA-256: 7fd769e85fd671e425e3ce5ab191ec8c9f5925c579a0797d31ce6d2002cd0029
font_01_sfnt_off00008c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2A 10564 bytes
SHA-256: 59d5bce9808af136bc0816ba1a2d33fb5684a670fb6344f7d5ab18994605b565