Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ec371c13f31f8c…

MALICIOUS

PDF

45.0 KB Created: 2020-10-04 11:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 56853798be532bedfa90a902e9ba2d20 SHA-1: 7bdb0f6c81e6a3a73f544d5faceca46de954484c SHA-256: 78ec371c13f31f8c8cb998f1f1aa5db993363808bd425a124937cd0585316e49
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=acramatic+2100+repair In PDF document text
    • https://site-1042889.mozfiles.com/files/1042889/88151022279.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/74777924029.pdfIn PDF document text
    • https://site-1040975.mozfiles.com/files/1040975/bagemedapoguj.pdfIn PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/damuwisofobironivoko.pdfIn PDF document text
    • http://mopafusig.sainttheresaattleboro.org/uploads/1/3/1/3/131381428/rojoruvezavipokazeg.pdfIn PDF document text
    • http://ramemodi.creaturesofchichester.com/uploads/1/3/0/8/130814132/roponunizirol-tuwud-bixer.pdfIn PDF document text
    • http://files.project-short.com/uploads/1/3/2/7/132711966/puzofe_nekojawajorov_porugegu_tinuketut.pdfIn PDF document text
    • http://files.tucsonfoothillslacrosse.com/uploads/1/3/2/3/132303164/dagimi.pdfIn PDF document text
    • http://pukolor.exconsultinggroup.com/uploads/1/3/2/7/132740478/molamamove.pdfIn PDF document text
    • http://files.alexjoll.biz/uploads/1/3/1/6/131637186/6442138.pdfIn PDF document text
    • http://files.jtwebworks.com/uploads/1/3/2/6/132680869/vebowawawuxepaj.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://cdn.shopify.com/s/files/1/0437/2883/0632/files/50972520334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/8432/4504/files/best_baseball_walk_up_songs_2019_clean.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6699 4756 bytes
SHA-256: b2f40e9511cf90971d7a33c084d0cb241814ed24af182821dc54d91517e03e45
font_01_sfnt_off000076ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76BA 10264 bytes
SHA-256: 8b979296ac8c830eb256bfa15ae567b7849fad940ff106f04e949ea552b8484d
font_02_sfnt_off000099a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333