Malicious PDF — malware analysis report

Static analysis result for SHA-256 718da4903295c624…

MALICIOUS

PDF

62.0 KB Created: 2020-10-02 19:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5c174d8b2cf3a9071eb095a0791b7ba6 SHA-1: 7a71336e9deea3c56e80b3970a168c8e1d684b07 SHA-256: 718da4903295c62445bea8d3861b46edcfdb32a2822f3f71cdb394c248baf368
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/strik?keyword=film+chouseishin+gransazer+sub+indo In PDF document text
    • http://fisivatig.remembering-the-past.com/uploads/1/3/0/7/130738796/8979539.pdfIn PDF document text
    • http://files.annabrusselback.com/uploads/1/3/0/7/130739971/433bbd.pdfIn PDF document text
    • http://siwin.siamthaispaandbeautycardiff.com/uploads/1/3/1/3/131398475/109ef2d24.pdfIn PDF document text
    • http://files.tabithakyle.com/uploads/1/3/0/8/130873830/vefugugatu-zagowuzuruxu-sulupowukon.pdfIn PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/mitujaxe.pdfIn PDF document text
    • https://site-1037882.mozfiles.com/files/1037882/17026984463.pdfIn PDF document text
    • https://site-1036652.mozfiles.com/files/1036652/loxorowegadifupavo.pdfIn PDF document text
    • https://site-1038390.mozfiles.com/files/1038390/vavexewutomewodepidudi.pdfIn PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/31715021879.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04cd7171-3ea9-40c8-9f47-c97061e39c1f/nijowixemelojapobuxadijuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbc043c-afb8-46be-a60c-9a92cc98bf94/sekotetemuvomoxezumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b96c29-a946-4d94-8091-5e995f38a369/fizikivexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/002c149c-9d07-4b92-93fa-f99ae2eab8fc/32042628303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb685b08-df14-48ff-acde-9b4bd0e5e8ff/tovumoxuwimelidijaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf48045-0d58-42d8-b5ae-9bb051018062/95392679180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c60a8de-38f7-4e0a-a5ab-329fd20b88c9/12614551227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a219fe9b-898a-479b-8c87-7524bf2d2b7a/91701966564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba7ecd12-ef6e-4cab-85d9-83f39e5fb1fb/wokikusizogeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de53ff72-63cc-4297-bada-b5e9642705e1/20573145756.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_off00008381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8381 11616 bytes
SHA-256: c2ae3cef7eb9c5963e54a5835a21708f3516b7b67801e1554780113d3a124728
font_01_sfnt_off0000a91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA91D 5496 bytes
SHA-256: 68bc91bd73fb73fd2f51b582393d09282f485fd257702c3c79841227f88c3fb9
font_02_sfnt_off0000bba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA0 2236 bytes
SHA-256: a5cb4918489952136b44c1aa6dd11d6d1859577cf30f416ccad1b66782247f89
font_03_sfnt_off0000c5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BA 10916 bytes
SHA-256: dbb8d6eb777615ae1f353ed45dd383170a48ab19d1e66be023235a894f1cf075