Malicious PDF — malware analysis report

Static analysis result for SHA-256 798470f8af709b09…

MALICIOUS

PDF

73.0 KB Created: 2021-02-18 08:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 46c874b5bac02ca49c05c47896dae8c7 SHA-1: 1ecd8a0af7ed845f7b8019425e1798cf53bf39aa SHA-256: 798470f8af709b09ccb483fc87368947f34bb55c929591a1074bf3eb1853fd7a
156 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, indicating it's a phishing or trojan delivery mechanism. It contains numerous external links, suggesting a link farm or redirection to malicious sites, with the primary lure being a 'cs go map callouts download'. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://maypoin.ru/wix?keyword=cs+go+map+callouts+download PDF link annotation
    • https://gorogonib.weebly.com/uploads/1/3/0/7/130775466/rowuba.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/ekIjh9c/nivozofirifu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408599/normal_5fdedd8135e6f.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/cujersb/my_synchrony_car_care_activate.pdfIn PDF document text
    • https://damasixo.weebly.com/uploads/1/3/5/3/135322107/navuwud.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/NbqheW7/qr_code_scanner_pro_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424341/normal_600671d2c0c48.pdfIn PDF document text
    • https://xufetujada.weebly.com/uploads/1/3/4/7/134745175/9260076.pdfIn PDF document text
    • https://zavoroxovedigij.weebly.com/uploads/1/3/1/3/131398250/4847fe684.pdfIn PDF document text
    • http://xupevagadozojad.22web.org/87925294144.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sesijesule/8357146845.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/liligesowulinafel.pdfIn PDF document text
    • http://difugarulid.epizy.com/protein_synthesis_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/frontline_commando_2_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/dilep.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/66732875480.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/slope_line_equation_worksheet.pdfIn PDF document text
    • http://livixutufedesuv.epizy.com/canon_6d_mark_11_manual.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_off0000e2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E8 5296 bytes
SHA-256: c6febe1fd7576b3ed08cc80053880c5e15354b32407145979ddb214eecc7aa8f
font_01_sfnt_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 10000 bytes
SHA-256: e17a2e2436741c8df894611b4c11abd176d5a05eb0ffdc2366e21a3663c459c6

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