Malicious PDF — malware analysis report

Static analysis result for SHA-256 489f059f16e24e03…

MALICIOUS

PDF

79.1 KB Created: 2021-04-27 17:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92a6e8865706bf28762756a7446f7a28 SHA-1: 9907a6e413b777e0b4013da23fac20e796431fca SHA-256: 489f059f16e24e03d51246b03d530ab6a47f029077206762cfca7f540eb8ba4b
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://xezojetit.ru/strik?utm_term=is+civil+engineering+a+good+career+in+india PDF link annotation
    • http://zavulibalox.mypressonline.com/36790372142.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/CvhiLm9/iowa_farmer_kills_wife.pdfIn PDF document text
    • https://cdn.sqhk.co/sururezog/iNtgghb/vemosoxojimasovulelaz.pdfIn PDF document text
    • http://veranezos.iblogger.org/241729357.pdfIn PDF document text
    • https://cdn.sqhk.co/vutabopi/xk8iejd/totally_accurate_battle_simulator_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/xezafube/jfihCij/words_of_wonder_match_puzzle_diario.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/eogjVib/83073678207.pdfIn PDF document text
    • https://cdn.sqhk.co/kosojilufut/jejjZBs/wirifu.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/gopro_hero_3_manual_silver.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/30018001145.pdfIn PDF document text
    • https://cdn.sqhk.co/nulupitet/g5hhz1L/bitmoji_app_for_chrome.pdfIn PDF document text
    • http://vawubarisef.22web.org/rorej.pdfIn PDF document text
    • http://puwufonizezez.22web.org/juwetuxorevudibivajugime.pdfIn PDF document text
    • http://zajugelepelu.22web.org/39986038339.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/kefefetafij/44349890078.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/memento_mori_rings_for_sale.pdfIn PDF document text
    • http://junebipizazob.epizy.com/cadence_17._2_hotfix.pdfIn PDF document text
    • http://koxolavomuzo.myartsonline.com/gavotosazub.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_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 5104 bytes
SHA-256: 1dcdc7fb9f57989b1da15f2a62a4de1a86ceb5af65a5a935d7936943c05682bb
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 10992 bytes
SHA-256: 2fc3d253d6941d750e983d851cd8258080623972a7fd0e901f727c0d22f1ca2f