Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed2dc76d7c2b763…

MALICIOUS

PDF

78.6 KB Created: 2021-03-04 18:23:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 61c01c225b9a7f79e40394bddd7b0d6d SHA-1: 4923a99efd4b8a58021a1194c8dada6298a4e28c SHA-256: 8ed2dc76d7c2b763950755e44c6cc75a63b763961b160958cef2621c948c7512
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'pelibifir.ru', and a heuristic firing for a 'download button lure' suggests a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF format and the nature of the links imply potential exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hp+w2207h+drivers+windows+10 PDF link annotation
    • https://cdn.sqhk.co/fefowofuk/jgiagie/28618082871.pdfIn PDF document text
    • https://cdn.sqhk.co/gukomoluda/igihfhj/ludo_star_2_mod_apk_android_1.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/30530208282.pdfIn PDF document text
    • https://cdn.sqhk.co/tofegejij/kijjejg/pakuxanejagarorozazinopol.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/jgNLjcy/mario_kart_tour_cheats_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/Ngi1tib/bikasur.pdfIn PDF document text
    • https://cdn.sqhk.co/natokaze/hdGgfig/bevumanetijulop.pdfIn PDF document text
    • http://dalojel.22web.org/fefowuzimus.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/ijfZhcs/59123090360.pdfIn PDF document text
    • https://cdn.sqhk.co/dizukenepu/aictAia/jixiba.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/duraflame_fireplace_heater_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davofunup.onlinewebshop.net/juzijasebelefuwejarepi.pdfIn PDF document text
    • http://viladanus.epizy.com/darkest_dungeon_gibbering_prophet_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/javascript_date_now_format_to_string.pdfIn PDF document text
    • http://xaziwukiba.epizy.com/fifty_shades_of_grey_full_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/deductive_reasoning_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/39071992866.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/calendario_2019_bolivia_feriados.pdfIn PDF document text
    • http://gitavini.epizy.com/calendar_2020_template_excel.pdfIn PDF document text
    • http://penoputibilexo.rf.gd/32994798095.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/66268242105.pdfIn PDF document text
    • http://gawusozuf.epizy.com/funepekefonijalej.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_off0000f346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF346 5324 bytes
SHA-256: 2c87f906f404a33bec677d12f43fbc166ce931a64d33f66641b261bbb53f298f
font_01_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 11888 bytes
SHA-256: b2ce215299018d389c62e55e46b596f25aca1a15c02eb7ac831bcd6b29919454

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