Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca0d384d55219a7…

MALICIOUS

PDF

70.6 KB Created: 2021-02-11 22:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 03883f98937d73639e0884b9ac648f10 SHA-1: 58efea2eda501d26fcff5992bc3c7064c0da76dc SHA-256: 8ca0d384d55219a7892f3fe1da447fc837acfc3fcc982de34cf6da840c08dc9e
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are part of a link farm, and is flagged by ClamAV as a phishing trojan. The document body, though heavily obfuscated, contains references to 'Puzzle and Dragons magic stones hack', suggesting a lure to trick users into visiting malicious websites. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to potentially malicious 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://baarspo.ru/wix?keyword=puzzle+and+dragons+magic+stones+hack PDF link annotation
    • https://cdn.sqhk.co/doginifa/hgsgigc/31472264972.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417312/normal_5fcfaa34d7f96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416796/normal_5fef0375c6990.pdfIn PDF document text
    • https://xovuxajewilim.weebly.com/uploads/1/3/0/7/130775567/novutemonesijeri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_601e798fa68dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498868/normal_600e7d1809651.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/ibtt1hi/98655789220.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/0ihTzhj/defensive_walls_in_battlements.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476270/normal_6003ce615299b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_60215d3254d89.pdfIn PDF document text
    • https://kusuxifitumaka.weebly.com/uploads/1/3/4/5/134593182/3810b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389581/normal_6007b02d528e8.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuzajomugi/fTkxKjb/lezemow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413373/normal_5fcca79961bac.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamujigip/jimiiYJ/mavufojalumeder.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_off0000d731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD731 5468 bytes
SHA-256: e3a7f0d03345c62fdfd90adde6dcb9df9a2b24f7f7782eb5239328f2914f67c2
font_01_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 10552 bytes
SHA-256: d39bdc8cbf96d283f9e75fa1c7367c78d1deb82376db0e9eac7970ddb08223ba

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