Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56424f37714258c…

MALICIOUS

PDF

111.9 KB Created: 2021-03-07 22:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eb1845ded64a645e2b198cb62090a04e SHA-1: 3ae245d10c31b585cda2f8817fb83fe91dbf8191 SHA-256: c56424f37714258c1dfd74ee3dd0900a0b3e928bcea34615aff1da32fce4f960
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://midufefew.ru/wix?keyword=como+se+forma+el+sistema+planetario+solar PDF link annotation
    • http://xuzobinemipivor.mygamesonline.org/fezutoxixajuwikili.pdfIn PDF document text
    • https://vavirewafikeja.weebly.com/uploads/1/3/4/4/134402836/monora.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/36286168931.pdfIn PDF document text
    • http://raisinsapp.pro/hp_p3015_maintenance_kit_installxpqnd.pdfIn PDF document text
    • http://jushq.pro/15210370880yoncc.pdfIn PDF document text
    • http://zerkalo-fugicar.website/mukuvogevanefasamuvokgzfb4.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/hg24jFa/67945491359.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/Ejhgfje/67945352648.pdfIn PDF document text
    • http://fullhp.info/33224142544qiirj.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/jigjAQr/global_warming_causes_hurricanes.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/26120f.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/sipuvefuxajumelif.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/pulosuxibak-belosulok.pdfIn PDF document text
    • http://wersita.space/navy_officer_recruiting_instructionl5q9u.pdfIn PDF document text
    • http://naturfresh.fun/3837682534hxz53.pdfIn PDF document text
    • https://tifalexax.weebly.com/uploads/1/3/4/4/134471923/mabawije_dujole_zisotuperasur.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/rerinago/bcs_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/wekexikelujuzozi.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/the_highly_sensitive_person_survival_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/creative_sound_blaster_z_vs_sound_blasterx_ae-5.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_off00017940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17940 4952 bytes
SHA-256: 34e29dcfb0109d7b30baff9d07fcb1c0f713ddd0fbee8fdd7a04e2ceb4d86ed3
font_01_sfnt_off000189ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189FF 12128 bytes
SHA-256: 7ebcdd40f59fbbdb252aab148a46ae1939b2b342e42a864e4398a901684b9352

Open this report in the interactive analyzer, or submit your own file for analysis.