Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8a7ffcfab61087…

MALICIOUS

PDF

75.8 KB Created: 2021-03-21 08:28:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 234f7f2509f0bfbd9d45e82fc20cc7a5 SHA-1: 9d287d5c02b171c3cf9eb95df774927d4e302378 SHA-256: 0b8a7ffcfab610870cfb718a2dcc5205455fea0863d22b8c5e727be284f9deb3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=what+is+meet+and+confer PDF link annotation
    • http://suwetobolubujub.getenjoyment.net/aumentare_l_autostima.pdfIn PDF document text
    • http://sirunome.mypressonline.com/gedisisageb.pdfIn PDF document text
    • http://shopee24.site/another_country_james_baldwin0lkz8.pdfIn PDF document text
    • http://kataeta.club/36800992550664w8.pdfIn PDF document text
    • http://prizinsta24.site/safety_1st_guide_65_sport_convertible_car_seat_glam2y4ft.pdfIn PDF document text
    • https://zodoxofavuzawa.weebly.com/uploads/1/3/1/4/131437464/cc9543b113bf.pdfIn PDF document text
    • https://wixokaregojes.weebly.com/uploads/1/3/2/6/132681478/kawebotu.pdfIn PDF document text
    • http://serdyukov.pro/46295064272p0cv6.pdfIn PDF document text
    • http://reduslim-shop.site/japuriccxjr.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/jukusutitinofeziwimijik.pdfIn PDF document text
    • http://eurostore.info/how_to_connect_ravpower_filehubdafss.pdfIn PDF document text
    • http://parrrtner.xyz/can_you_use_gimp_on_ipadfgkf7.pdfIn PDF document text
    • http://dompodklyuch.com/science_of_interstellar_epubj4dde.pdfIn PDF document text
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/eede1c7ccd15a.pdfIn PDF document text
    • https://vokipokulolobu.weebly.com/uploads/1/3/4/0/134016984/2c76605b68a518.pdfIn PDF document text
    • http://extrameets.fun/will_amazon_release_the_expanse_season_4_on_dvdge97f.pdfIn PDF document text
    • http://dorightunion.com/stranded_deep_mac_freeesudt.pdfIn PDF document text
    • https://darurirajilubi.weebly.com/uploads/1/3/4/3/134318819/314c8561bf.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/75892cb7-1280-40e6-8c5a-8d93669fd7df/brother_sewing_machine_vx-1120_troubleshooting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3005a65-f4a9-4c27-8fbe-5f8e9e2fd622/how_to_pair_my_bose_headphones_to_my_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac04676e-3fad-4f25-b188-67013b227b4f/is_comparative_research_qualitative_or_quantitative.pdfIn PDF document text
    • http://wumugajus.onlinewebshop.net/official_gre_verbal_reasoning_practice_questions_2nd_edition.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_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 5244 bytes
SHA-256: 8406878d658ee8e46302d630b308a3302170565519ac12a59ff59a1fc643abcb
font_01_sfnt_off0000fc66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC66 10952 bytes
SHA-256: d723d9b1ee3c67aa2460a1d9f107781ba1f0b46126263e6dd059f69ceb8d0744

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