Malicious PDF — malware analysis report

Static analysis result for SHA-256 730086869c95e7d5…

MALICIOUS

PDF

92.5 KB Created: 2021-04-04 05:40:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8858afe511d5ec0f57c890fec9d652bb SHA-1: fd8f2eefa21d54f67121f726f7acf0f1549c611b SHA-256: 730086869c95e7d5f7074194241cd20661d229f6f802a14138e01ab27730aa25
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that redirects to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect 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://dugedepap.ru/award?keyword=worked+problems+in+ophthalmic+lenses+pdf PDF link annotation
    • http://zovofuti.mygamesonline.org/24342219942.pdfIn PDF document text
    • http://itfamily.info/61007363496avxp4.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/lerimu.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/faruweg.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/jivoradezujusixisenesit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_600f9d683f02a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485457/normal_5fe0a95d43bb7.pdfIn PDF document text
    • https://tekerigaxigo.weebly.com/uploads/1/3/4/7/134702693/518363.pdfIn PDF document text
    • http://help-igcopyright.xyz/77605552360u219o.pdfIn PDF document text
    • https://sufewusog.weebly.com/uploads/1/3/4/6/134644796/davaruzexazop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_60616efe05f4d.pdfIn PDF document text
    • http://belkwigs.com/meaning_of_academic_performance_according_to5510m.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/netgear_n600_router_reset_password.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495691/normal_5fc865ac04d9e.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/nutrient_agar_merck.pdfIn PDF document text
    • http://vash-komfort5.ru/nezugopidewuqjaee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb52d638-22f2-4e55-8b69-4b4d57a31df7/51958913847.pdfIn PDF document text
    • http://limufij.myartsonline.com/68939331641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db94ad9-6838-4a3f-ae53-92057a173e70/nepurenawelomuge.pdfIn PDF document text
    • http://bamonoxo.onlinewebshop.net/kixekarimufefig.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/which_samsung_models_have_wireless_charging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1547e2c7-4fb3-4fd4-83ce-43876bdaa6ac/strongs_concordance_number_444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16b6f94-b427-422c-9404-61e8baa4aa20/gift_of_finest_wheat_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc214d35-7201-4b53-b429-26cf7a269d7f/warhammer_fantasy_rulebook_editions.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_off0001286d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286D 5612 bytes
SHA-256: 16d6f2336332878394d42cdfb571bc06b16b770daf94f03bdbaa03660b90f9a9
font_01_sfnt_off00013b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5F 12112 bytes
SHA-256: 25a72424769c997a21156dc9b002343377eaa8ee64734fa903edd60c1cc25fe2

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