Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11ac96006201024…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 18:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5dc30d6bf913e98eb96127e31b228dea SHA-1: 20258c1cd51aca6c50b420de2eb4f536486768fe SHA-256: b11ac96006201024ff4c3f2f7ea0cf980d381418cf244994f69575c3995c263b
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URLs, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this, pointing towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/123?utm_term=canadian+fugitives+autopsy+report PDF link annotation
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/nokaso_kasagezex.pdfIn PDF document text
    • https://mogimefiledewe.weebly.com/uploads/1/3/1/8/131857364/gadikoto.pdfIn PDF document text
    • http://lady-bug.club/how_to_change_belt_on_maytag_performa_dryerraasu.pdfIn PDF document text
    • http://ideal-it.fun/trending_tech_news_worldwidexduzq.pdfIn PDF document text
    • http://com-connexion.xyz/968843081739vbze.pdfIn PDF document text
    • https://fevenegor.weebly.com/uploads/1/3/1/3/131380973/9568378.pdfIn PDF document text
    • http://sesalon.xyz/wanumowunivopavakalavadyog2j.pdfIn PDF document text
    • https://wizenifove.weebly.com/uploads/1/3/4/3/134308138/sadijememo.pdfIn PDF document text
    • http://antonioit.space/75830988547h103q.pdfIn PDF document text
    • http://trening-ekaterinodar.ru/tai_chi_training_sword0p1ii.pdfIn PDF document text
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/438fa6d466c87.pdfIn PDF document text
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/rixigabuje.pdfIn PDF document text
    • http://cafe-cok.ru/woraj3qk83.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/what_attachments_fit_husqvarna_128ld.pdfIn PDF document text
    • http://rusherx.studio/58426031550qnsu3.pdfIn PDF document text
    • https://kitopelok.weebly.com/uploads/1/3/4/3/134355781/5001000.pdfIn PDF document text
    • http://comforfemj.fun/53901984345q4unr.pdfIn PDF document text
    • https://peguduzivinaw.weebly.com/uploads/1/3/1/6/131606374/1465345.pdfIn PDF document text
    • http://emmetrix.net/pretty_little_liars_episode_guidembi7g.pdfIn PDF document text
    • http://avto-trokot.xyz/xozikarediil6gq.pdfIn PDF document text
    • http://testertumentum.space/shoki_alkayida_song3blb3.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/29c494d.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/marketing_research_activities.pdfIn PDF document text
    • http://like-store.site/gefulexaxavemirajiwetu80ad7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejufutaz.onlinewebshop.net/the_uglies_book_report.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_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 5244 bytes
SHA-256: af76fe6faa1354031cdb4df58c34f6af78921954ee88b8125762c5d6e539229b
font_01_sfnt_off00010efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFE 10392 bytes
SHA-256: f17a718a700491758cc03b2d842bf554c8a586734ae749810ba202f01535fdb1

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