Malicious PDF — malware analysis report

Static analysis result for SHA-256 31c7fe593977ccc0…

MALICIOUS

PDF

38.3 KB Created: 2020-10-07 20:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0c29c4a73acbaf4c3fd5a73c36ec3c3a SHA-1: b2f583cceca335537934e03224b9baed7001fd5d SHA-256: 31c7fe593977ccc04254758ab6b1e4a0e5500e25e11a4abcda25e846ebdd6647
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=remember+when+judith+mcnaught In PDF document text
    • http://files.shoprustique.com/uploads/1/3/1/6/131637095/64e2dc4e.pdfIn PDF document text
    • http://dodab.missbilovsky.com/uploads/1/3/0/8/130814471/wulajadidofawonut.pdfIn PDF document text
    • http://files.oldpixhamschool.com/uploads/1/3/2/3/132302944/dibupopejuzom_jadazurebotesat_zopada_wabojomanaxa.pdfIn PDF document text
    • http://files.montrealbicycleclub.com/uploads/1/3/1/4/131406527/zixejaz_kebim_bawuzasete.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/woxisinibamoveboberukedop.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/lipalilolejaw.pdfIn PDF document text
    • https://site-1036839.mozfiles.com/files/1036839/kojuroselifajinaturoboti.pdfIn PDF document text
    • https://site-1039436.mozfiles.com/files/1039436/guzivibararolojodigoka.pdfIn PDF document text
    • https://site-1038351.mozfiles.com/files/1038351/9467823879.pdfIn PDF document text
    • https://site-1037122.mozfiles.com/files/1037122/25532970504.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/zupatinawifizetofefagov.pdfIn PDF document text
    • https://site-1037886.mozfiles.com/files/1037886/duxovivizovojemogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5869 5460 bytes
SHA-256: e140e3e458caeba872060fdad0817678c6e21f6ba5db24253490536887fd644f
font_01_sfnt_off00006ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE1 9936 bytes
SHA-256: f5aa9d76843a0eb925b1a424081e992aa12cb8b085a3db98b19b510209497e42