Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d63656e002fb475…

MALICIOUS

PDF

74.2 KB Created: 2021-03-26 07:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b62d61188c807ba9703c777d14e0ac SHA-1: ad6798bcbcc49fe362f4f110b29ddd312ad382c2 SHA-256: 8d63656e002fb475f1e346d8a3a1ad0caea85b763f466e4f007bba3737f37f88
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, many of which are numeric slugs, suggesting a link farm for SEO manipulation or phishing. The document body, though heavily obfuscated, appears to reference software downloads, aligning with the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=mount+and+blade+warband+tweakmb+1.168
    • http://pixidilivutep.medianewsonline.com/57529080410.pdf
    • http://kekijojovif.sportsontheweb.net/asian_countries_name_list.pdf
    • https://zufikuwokuz.weebly.com/uploads/1/3/4/5/134522796/wagerubit_benuv_zadugopijaloso.pdf
    • https://jepifobowokeba.weebly.com/uploads/1/3/0/7/130776363/127838.pdf
    • http://mishabelle.ru/62653969994zxc1m.pdf
    • http://midimox.getenjoyment.net/wipimotew.pdf
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/3862323.pdf
    • https://dotozirijekuzo.weebly.com/uploads/1/3/4/3/134315872/widap-sarezizazenon.pdf
    • http://idealslimitalia-official.site/cheap_decorators_dust_sheets1hdma.pdf
    • http://kexumojazo.mypressonline.com/atmega328p_datasheet_complete.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wanalovum/weighted_grade_excel_spreadsheet.pdf
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_9c05ce7a04ad48d5baee651607bd613e.pdf?index=true
    • http://vajapojaperusu.myartsonline.com/1_year_biology_book_download.pdf
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_7fac19256e2143e8a4c7283a61d307e7.pdf?index=true
    • https://s3.amazonaws.com/gofiguj/78644693196.pdf
    • https://s3.amazonaws.com/latufenaw/61855639544.pdf
    • https://3e206333-d6ff-4be5-a246-6289f7259d3b.filesusr.com/ugd/973a7d_10bed56cea2f4f6bb77c7d1312c8bd7e.pdf?index=true
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_6763a07f38eb49ec851e044054f8677e.pdf?index=true
    • https://s3.amazonaws.com/minabiwa/58649688895.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3f9.bin
f21dec3bfd31ecbcd9146672bf8f9be3d2543af65da3404419c14fb1e2bc5888		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 5528 bytes
font_01_sfnt_off0000f6d0.bin
3f987a47101083b0d2995130d7e5577128ac220d8121f6dc5993e8186ebb060d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 10668 bytes

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