Malicious PDF — malware analysis report

Static analysis result for SHA-256 5692971a93385133…

MALICIOUS

PDF

84.7 KB Created: 2021-03-11 05:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ed23537feabddb0d15c012dba844c9a7 SHA-1: 98ca7b0b8c8c7f7c4e9123d6398c8ea4d244c677 SHA-256: 5692971a933851332d9270b7f7a874288bbf48fd6b898b2309c9f52dbdd981b6
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged by ClamAV as Pdf.Phishing.Trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the presence of numerous external links and the ML classifier's high confidence score point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 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://maypoin.ru/123?utm_term=haematology+report+wbc PDF link annotation
    • http://instapriz24.site/operating_life_cycle_costyn1mw.pdfIn PDF document text
    • http://parkingtest.xyz/58964369290bprsi.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/how_to_read_korean_easily.pdfIn PDF document text
    • http://everydayy.fun/julia_child_mastering_the_art_of_french_cooking_vol_2cvwi6.pdfIn PDF document text
    • https://lixubirenolona.weebly.com/uploads/1/3/4/6/134669397/102d5b730da33.pdfIn PDF document text
    • https://sarefipa.weebly.com/uploads/1/3/1/3/131398419/16adc569bed655.pdfIn PDF document text
    • http://xifuponek.iblogger.org/kiririt.pdfIn PDF document text
    • http://zitirisiz.mywebcommunity.org/gasalixuxajajesunojukufoz.pdfIn PDF document text
    • https://wixotavu.weebly.com/uploads/1/3/4/7/134764887/177dbb.pdfIn PDF document text
    • http://wajuxerisowo.iblogger.org/37175008350.pdfIn PDF document text
    • http://maleev.online/penn_state_bookstore_face_masksfnqvz.pdfIn PDF document text
    • http://bcpreactiva-enlinea.com/294809327698wcxq.pdfIn PDF document text
    • http://shoop-fr.ru/one_god_and_one_mediator_kjv3j86s.pdfIn PDF document text
    • http://zinefikitozozeg.sportsontheweb.net/foliweguvagen.pdfIn PDF document text
    • http://stickerrus.ru/bajej4wnaa.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/how_many_questions_are_on_the_cdl_combination_test.pdfIn PDF document text
    • https://xuberirerumona.weebly.com/uploads/1/3/4/5/134586272/wibutadu-bulosofakefedo-gobegixipavivow.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/7443164e.pdfIn PDF document text
    • https://pakotoroxup.weebly.com/uploads/1/3/0/8/130815058/112e5e29.pdfIn PDF document text
    • http://moymagazin.xyz/26132228092tfzqk.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/7424a5bc035d5.pdfIn PDF document text
    • http://erse.xyz/227083873896c0zv.pdfIn PDF document text
    • https://garepogive.weebly.com/uploads/1/3/4/8/134871831/walozuwepaxejul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jupejorix.epizy.com/75964609870.pdfIn PDF document text
    • http://siwodonodefofo.epizy.com/83159576930.pdfIn PDF document text
    • http://nuzifopivezalam.rf.gd/pugevidafabenepuk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DE 5372 bytes
SHA-256: 160619cc617facbdf6b9c20da5305032649085a9085084db203efffec452d58d
font_01_sfnt_off00010722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 11296 bytes
SHA-256: 0fbdc02d50da006d239bcf506d917f905029c4e3ab4a0c69057b2bdf639c6445
font_02_sfnt_off00012e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E03 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501