Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2737e4797fdf2af…

MALICIOUS

PDF

72.6 KB Created: 2021-03-15 21:43:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8a7f7b65a0fdc7603387211397056507 SHA-1: eaceecc1ae0a9a219f75b9509609f21b80269bdd SHA-256: e2737e4797fdf2af89accef3bd0c5843d55be426e9e98e8ab5399ac2a6fc0803
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 0.9998

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://maypoin.ru/wix?keyword=structure+of+the+nephron+coloring+worksheet+answers PDF link annotation
    • http://italywom.space/nightcrawler_fishing_wormstk4jq.pdfIn PDF document text
    • http://juzagunugix.iblogger.org/craftsman_yts_3000_parts_manual.pdfIn PDF document text
    • http://heleogose.online/19547375209l1aoq.pdfIn PDF document text
    • https://cdn.sqhk.co/zavoragive/nhfhhhf/11128480036.pdfIn PDF document text
    • http://erse.xyz/best_text_to_speech_voice_for_androidla4kv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_5fd13365c9d40.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/jH8iajc/sports_bike_hd_wallpaper_for_pc.pdfIn PDF document text
    • http://abwaab.su/pakabunolofepaxaxufuw6utf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468563/normal_5fc7d205a85b0.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/hjcfgY4/ncert_books_and_solutions_app_download_for_laptop.pdfIn PDF document text
    • http://item-mask.top/how_much_do_delta_flight_attendants_makegs1wq.pdfIn PDF document text
    • https://cdn.sqhk.co/jodidone/fghjbWa/b_extract_form_number.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/iDEjdgd/digidesign_003_rack_drivers.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/jozaponi/whatsapp_baixar_android_gratis.pdfIn PDF document text
    • http://nejajubuwuwo.rf.gd/malayalam_english_dictionary_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cc16dc6-eb7d-4a09-897e-13ad0b7c2d3a/11791428674.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/the_alliance_alive_hd_remastered_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/53176152402.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c66559-4b19-4272-a62e-d0a0350a333e/94644878285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec8b20d-8d84-4bca-911d-1307547e823c/2019_drz400sm_owners_manual.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_off0000df8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8D 5536 bytes
SHA-256: 5d2eb69a44d8ea9fbee8dbcf060bf524cb282b6a18f5a5c032612ece0682355c
font_01_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 10164 bytes
SHA-256: 550f3d1b84b63fc7d756f6b3bb1b673c5d262e84fe17be5a1f1a54013ab56e86

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