Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e01104d2f862d0…

MALICIOUS

PDF

74.2 KB Created: 2021-02-16 08:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 76e0fca529afb35364282ad07f337fa7 SHA-1: bafdde85492b00d9055eaa462c326448b38b842a SHA-256: d2e01104d2f862d0df9b5227f1064391de2e67c5e3aec5b330c14a788b6e7733
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though partially corrupted, indicates a lure related to a 'Plan de estudio de la biblia por libros'. No scripts were extracted, but the presence of numerous external URLs points towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 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.
  • 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://jacksth.ru/strik?utm_term=plan+de+estudio+de+la+biblia+por+libros PDF link annotation
    • http://kuvelopomegemes.iblogger.org/85157076429.pdfIn PDF document text
    • https://kasezikibojeg.weebly.com/uploads/1/3/1/8/131871727/sapasirakivo_jotexekas_zupodij.pdfIn PDF document text
    • http://evatopshop.xyz/yoshio_kondo_biografia46ci8.pdfIn PDF document text
    • https://cdn.sqhk.co/jotepomi/UkGjhdq/tafulawefixele.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/iiejfgd/desiree_nosbusch_aktuell.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/a9ulKhe/72383644979.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/zoribake_kotukor_tiridemegesubos_jasos.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/6745813.pdfIn PDF document text
    • https://cdn.sqhk.co/jazepoxamib/eSIpChi/star_wars_pinball_ps4_release_date.pdfIn PDF document text
    • https://xikunozazoteta.weebly.com/uploads/1/3/1/4/131453294/1174751.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/bhi03gi/irish_treasure_rainbow_bingo_freebie.pdfIn PDF document text
    • http://minuette.me/fofom99leg.pdfIn PDF document text
    • http://roman-holidays.shop/sidofasixelejomew3de67.pdfIn PDF document text
    • https://navojinalano.weebly.com/uploads/1/3/4/7/134755450/4224674.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sedabil.epizy.com/84088991785.pdfIn PDF document text
    • http://segegilomojok.epizy.com/jenokanofamapo.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_off0000e387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE387 5092 bytes
SHA-256: cf5325fa816afb4565f37c05f01da822700fc1d1c9472253ba8c6aade1f1afdc
font_01_sfnt_off0000f4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DB 11476 bytes
SHA-256: cd5b754396e87c5cdbaee4f9071c923d3f73860dd83b977a411f811463d0e428

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