Malicious PDF — malware analysis report

Static analysis result for SHA-256 68ea96a830972fa7…

MALICIOUS

PDF

110.0 KB Created: 2021-04-09 00:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8557025c58556f72d5726fbadb1c33d3 SHA-1: 99be254e36dda5eac38f2e562e02a4d8c82422c5 SHA-256: 68ea96a830972fa7218ec009e748d156865f59dcd6a1f6da496f67139be11aaf
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

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://pelibifir.ru/strik?utm_term=fallacies+list+summary PDF link annotation
    • https://cdn.sqhk.co/kajutizikodu/Cidbyji/brimming_definition_example.pdfIn PDF document text
    • https://nugazemagutum.weebly.com/uploads/1/3/4/3/134346004/napikidogireg.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/45963611504.pdfIn PDF document text
    • http://fuwijumazawad.mywebcommunity.org/adaptation_in_plants_for_class_4_worksheets.pdfIn PDF document text
    • https://mobasulu.weebly.com/uploads/1/3/0/7/130776822/06628.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/jdiffhd/vampires_vs_the_bronx_cast_age.pdfIn PDF document text
    • http://sopidemeleket.mygamesonline.org/56663294079.pdfIn PDF document text
    • https://tigatomexinopi.weebly.com/uploads/1/3/4/4/134460375/5a0a8802165bd1e.pdfIn PDF document text
    • https://debuvubuni.weebly.com/uploads/1/3/4/8/134846467/somed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejumobax.atwebpages.com/77134475897.pdfIn PDF document text
    • http://pofitubawonu.atwebpages.com/87387623728.pdfIn PDF document text
    • http://palibam.atwebpages.com/kuzojajumegatufabokubiri.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/ikea_high_chair_weight_limit.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/facial_sheet_mask_korea.pdfIn PDF document text
    • http://fukijudetoj.epizy.com/75701699047.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/wulunusujutavagotot.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/66458975516.pdfIn PDF document text
    • http://temodorofeg.atwebpages.com/describing_people_s_appearance_english_exercises.pdfIn PDF document text
    • http://kevuwibevuvibor.epizy.com/bokukexi.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_off00015cf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CF8 5000 bytes
SHA-256: e83e7dbc4c9e400f526f1657e9c307cf3ad8e6d6e5c7ab4332a14afca7283a8d
font_01_sfnt_off00016deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DEB 11552 bytes
SHA-256: 0c19f03c01bb6c0063997969ecc72f4604d7f61b5f33a747684592469d206f86
font_02_sfnt_off00019524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19524 16136 bytes
SHA-256: 1c35dd0f54a1a74832c0d6220adbf02846a676e2f38c0d0352621eb7f033f102

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