Malicious PDF — malware analysis report

Static analysis result for SHA-256 29988af584417acc…

MALICIOUS

PDF

71.8 KB Created: 2021-06-13 18:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 68f8976c4426c291dea441ecd1626e76 SHA-1: 7eb60a62e514a7a7e86b867fa3c5fa83a17f9168 SHA-256: 29988af584417accbe2ecf70f70fe3a64e115596dcfee489d32480af026fd5c0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or redirection scheme. The primary URL, "https://crysiq.ru/pbw?utm_term=celebrity+look+like+me+app", is likely used to direct users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crysiq.ru/pbw?utm_term=celebrity+look+like+me+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483365/normal_601336f689e24.pdfIn PDF document text
    • https://vebupixe.weebly.com/uploads/1/3/4/8/134854050/93113.pdfIn PDF document text
    • https://salubekera.weebly.com/uploads/1/3/2/7/132740515/9225602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_6063a7c205cef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_604d2d2e9734e.pdfIn PDF document text
    • https://tojejalunegod.weebly.com/uploads/1/3/2/7/132710717/727be928.pdfIn PDF document text
    • https://nepuvojikonutoz.weebly.com/uploads/1/3/4/6/134677469/gofigofa.pdfIn PDF document text
    • https://nozipukox.weebly.com/uploads/1/3/6/0/136057246/mepefu-nezojezilasogux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484355/normal_5ff2d7062dfdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_60c4c75b50524.pdfIn PDF document text
    • https://gunulavosaki.weebly.com/uploads/1/3/4/3/134374607/02921859ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379038/normal_5fcf08988bd1d.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/0438cfc6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lururefisu.pbworks.com/w/file/fetch/144566853/33240696676.pdfIn PDF document text
    • http://ravowibosu.pbworks.com/w/file/fetch/144783036/interstellar_movie_in_hindi_dubbed_telegram_link.pdfIn PDF document text
    • http://kinuwibe.pbworks.com/w/file/fetch/145160202/belogenatoxinarozuwawin.pdfIn PDF document text
    • http://zigunef.pbworks.com/f/33343189136.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/w/file/fetch/144750627/mebofipedimegeda.pdfIn PDF document text
    • http://sogotobev.pbworks.com/f/sakodavibukugeve.pdfIn PDF document text
    • http://jadubunid.pbworks.com/f/74252798379.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_off0000de0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0E 4996 bytes
SHA-256: fa7d0e10d5431c0862fc3b297b92b1ebad1d4785cec20076fc03003e23d19e56
font_01_sfnt_off0000eef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF7 10356 bytes
SHA-256: 57f3251790361e1a7b5bd44ae4d90361e13ae61fd320434285b631c2d95c9a1a