Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d4fae9e71690cc…

MALICIOUS

PDF

115.2 KB Created: 2021-06-01 22:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6c18c0e3f7f7654aff607921987a6131 SHA-1: 822a495afb01e21c367f6ee20f06a9c8104ca5a3 SHA-256: 98d4fae9e71690cc3ca08965ad006f0c3b2126c94ac6eefaeb820ca20ca23e66
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 0.9995

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://philabc.ru/pbw?utm_term=dragon+ball+z+saiyan+saga+card+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502188/normal_5fd65deda14bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffab44971c51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385633/normal_601da23c98bbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_60221427ef8e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_602c4f4084892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_605647dec75bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5ff5822f80bde.pdfIn PDF document text
    • https://xavebebojemap.weebly.com/uploads/1/3/4/8/134848852/6165421.pdfIn PDF document text
    • https://gunagejosiva.weebly.com/uploads/1/3/0/7/130738835/338c2c57389.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/21d2f5e1-0388-445f-a6b3-704f2d2f5d45/pasewibesafejibobefe.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144454323/multiplication_nombres_dcimaux_cm1_exercices.pdfIn PDF document text
    • http://vejivab.pbworks.com/f/how_to_pair_echo_dot_3rd_generation.pdfIn PDF document text
    • http://mumubib.pbworks.com/f/what_does_42_mean_in_hebrew_gematria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/749e3b83-cafe-4b86-bdbb-ebecc99342c5/what_are_the_words_to_go_to_sleep_my_baby.pdfIn PDF document text
    • http://tusawijer.pbworks.com/w/file/fetch/144449850/74578415413.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/kuch_kuch_hota_hai_full_movie_eng_subtitle.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/las_colinas_course_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359ab5a3-5fdb-4cd9-a6d1-4c0a0222b02a/schumacher_xp2260_charging.pdfIn PDF document text
    • http://jopamedet.pbworks.com/w/file/fetch/144445029/reading_and_discussion_questions_the_lottery_answers.pdfIn PDF document text
    • http://fixiguru.pbworks.com/f/boledenexalovosubasufut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6348078-064c-40e7-89a7-69846adf4f29/36423162682.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_off0001879f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1879F 5400 bytes
SHA-256: d43341cf066074266f71b33932f5e55a0552f11ba2472f8a9b141e894c692039
font_01_sfnt_off00019a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19A18 10788 bytes
SHA-256: 784ef1fc7bda7ad0014f6a1b9f68364578e6556e57054840d3934aecdcd11dd3

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