Malicious PDF — malware analysis report

Static analysis result for SHA-256 83cd643cf9039e39…

MALICIOUS

PDF

67.4 KB Created: 2020-11-26 18:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 87696b5bd091836aa61eb56f9f30c398 SHA-1: 7f9617d908952a14739314c2d5b6966c97b7f873 SHA-256: 83cd643cf9039e39b9b62e02b11c582a8fd3d270d20d6e42b559689f6ce63ef8
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain a lure related to TV remote control, which is likely a pretext to drive users to malicious infrastructure.

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
  • 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.
  • 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://gettraff.ru/strik?utm_term=how+to+turn+on+my+tcl+roku+tv+without+remote In PDF document text
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/9683409.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/fuxazomita.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f874fedcae79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478148/normal_5fbeaf217b488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5f8c042883820.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/babetafaperaxov/birthday_greeting_card_maker_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/movixuzamefidozu.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/noun_phrase_worksheet_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/jakitotalutapusejoni.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/allure_report_take_screenshot.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/77846734874.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/zeboxurarutiforewodejoz.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/chitralekha_1964_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/ls_league_of_legends_rank.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_off0000caf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF4 4928 bytes
SHA-256: 10a16a1051aeab04f7967accdaa0ad51502671d9ad98a52d744e769b52199f7b
font_01_sfnt_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 10808 bytes
SHA-256: b464e901ed3aeb3ea85746040d25a1584292a2e967a37e3fbfab331ccd61e991

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