Malicious PDF — malware analysis report

Static analysis result for SHA-256 d244b0bfe7249f39…

MALICIOUS

PDF

69.8 KB Created: 2021-02-04 23:00:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e7d15356f80446672119e98c36f044e2 SHA-1: 6ea88be326b54d9c46eed6eaa89c93b52eef4cfc SHA-256: d244b0bfe7249f39d43a95cb50443599dc8cb53d61569dba4e363790851c57f4
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known redirector infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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
  • 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://yafferge.ru/123?utm_term=tengo+la+camisa+negra+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417519/normal_5fd6449f989e5.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/chhfRoX/increase_followers_on_instagram_app.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/vapulizep.pdfIn PDF document text
    • http://rollernefrit.xyz/81398900256j1dzn.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/h3jenCA/tovewuwolawozezisofederes.pdfIn PDF document text
    • https://sezowizubuv.weebly.com/uploads/1/3/0/8/130874308/acc5300a660.pdfIn PDF document text
    • https://kufavugozit.weebly.com/uploads/1/3/5/3/135309998/6521793.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/4640067.pdfIn PDF document text
    • http://zobebukore.22web.org/arsenal_vs_tottenham_4-_2_highlights.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/9hjhcbc/matudovakanisatod.pdfIn PDF document text
    • https://zumuwezejulo.weebly.com/uploads/1/3/1/4/131455722/jilasa.pdfIn PDF document text
    • https://cdn.sqhk.co/wefenilu/dnpk6hf/surapezonigog.pdfIn PDF document text
    • https://zisusanizapan.weebly.com/uploads/1/3/0/7/130775047/mekunuv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wapudajikipidem.epizy.com/baadshah_audio_naa_songs.pdfIn PDF document text
    • http://sikirubuguje.epizy.com/tizeb.pdfIn PDF document text
    • http://pukafenofi.epizy.com/tawaxovebuduvufun.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_off0000cb92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB92 5172 bytes
SHA-256: fdc0be6830f707df6f72c2c35ef227b26b9c8148bca40861467027ce9672bc5f
font_01_sfnt_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 14576 bytes
SHA-256: 87f8c0055007c6883cbd8fe221b6815da4fb1f45aaeadaff113b79cc8519e3c8

Open this report in the interactive analyzer, or submit your own file for analysis.