Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34470826e9ef632…

MALICIOUS

PDF

72.9 KB Created: 2021-06-13 08:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a7bdbfcdff8606d69d243cb07ff3860d SHA-1: cfe4eaeb39c366673c06d7b8a9f9b85dae4f5b81 SHA-256: f34470826e9ef632494205b00c166dfa9005916c1616ab3042555d41ff3d6fec
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to Yu-Gi-Oh! cards, directing users to a URL that includes 'yugioh' in the query parameters. The presence of embedded URLs and the nature of the link farm indicate an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://crewmak.ru/pbw?utm_term=yugioh+legendary+duelist+white+dragon+abyss+card+list PDF link annotation
    • https://nuxelimifa.weebly.com/uploads/1/3/0/7/130776070/8249065.pdfIn PDF document text
    • https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/7890571.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_6065ed664eebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_602ca4cb9d356.pdfIn PDF document text
    • https://nupurotuxi.weebly.com/uploads/1/3/4/8/134854616/207670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469365/normal_601c69e425b0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454432/normal_600f95d587264.pdfIn PDF document text
    • https://jefexalenu.weebly.com/uploads/1/3/4/8/134865696/latonokowirizuz.pdfIn PDF document text
    • https://wugexufaferefe.weebly.com/uploads/1/3/0/7/130776446/5133535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_60215ca9cc4ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381532/normal_5fcdddd00e276.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/6f3f3e1cd412e3.pdfIn PDF document text
    • https://xiramulume.weebly.com/uploads/1/3/2/6/132682542/varerawevufe.pdfIn PDF document text
    • https://robiwadanojiso.weebly.com/uploads/1/3/4/6/134644007/dipizakitakesat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451575/normal_60bd39d135ab6.pdfIn PDF document text
    • https://dakubotamijez.weebly.com/uploads/1/3/2/7/132712147/jarunokas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_606217d880c61.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
    • http://nagomax.pbworks.com/w/file/fetch/144424821/31470588362.pdfIn PDF document text
    • http://jananevava.pbworks.com/f/20731459624.pdfIn PDF document text
    • http://watapabipos.pbworks.com/f/five_nights_at_freddys_5_free_download_ios.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144425679/firurugejalim.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/3669984232.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_off0000cf18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF18 5380 bytes
SHA-256: 5bebd0f6993e5ae7451ec1741e49a9cf5e02632991e82ae0496b1db1cbe230c5
font_01_sfnt_off0000e165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE165 11388 bytes
SHA-256: 2307e141041fe51beeb56d295c9020be4d852f7fdf68900ba0c79284e6105c28
font_02_sfnt_off0001077c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333