Malicious PDF — malware analysis report

Static analysis result for SHA-256 d047aa355426096d…

MALICIOUS

PDF

161.0 KB Created: 2021-03-25 06:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6d86ee6b048483a85662dee04607cfdd SHA-1: 370db37f08192fe8ff348f79e16f5a260e14b518 SHA-256: d047aa355426096d71010f121e98dd4121ecd7303020ef9dc9477ed245990613
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 0.9997

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://ponafet.ru/wix?keyword=the+new+deal+an+alphabet+soup+of+agencies+worksheet+answer+key PDF link annotation
    • http://ukranews.site/gurepetozalarutafudu3alc4.pdfIn PDF document text
    • http://mastericy-chistoty.ru/how_to_draw_a_furry_dog_step_by_stepk3g3q.pdfIn PDF document text
    • http://it50life.pro/nunitujejokomadawijoxezeg6fuj.pdfIn PDF document text
    • http://kenaxifinot.22web.org/wodofidupejupalonepexer.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/simplifying_complex_numbers_worksheets.pdfIn PDF document text
    • http://hairhome.moscow/2000_ford_ranger_radio_diagram44shv.pdfIn PDF document text
    • https://vezijukifi.weebly.com/uploads/1/3/3/9/133997169/1265247.pdfIn PDF document text
    • http://gouliwer.online/difference_between_apollo_twin_solo_duo_quadxw9em.pdfIn PDF document text
    • http://letekidela.iblogger.org/xugevejepona.pdfIn PDF document text
    • http://italywow.pro/why_did_they_shoot_old_yellerioo3u.pdfIn PDF document text
    • https://komojagalon.weebly.com/uploads/1/3/4/8/134885500/f204ff0b6.pdfIn PDF document text
    • http://subonus.ru/natural_born_heroes_book113ho.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a1d9b5db-e0fc-4efa-b026-dc82ed60320d/ap_calculus_ab_practice_exam_2018_answers.pdfIn PDF document text
    • http://sidajewaset.epizy.com/kunduz_province_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb68935d-6612-45b5-942b-5b851e717d38/how_to_use_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356a50a8-29bc-4d4f-bc08-e49bd722e245/where_to_buy_timex_watch_batteries.pdfIn PDF document text
    • http://xutewedosobu.rf.gd/23046728000.pdfIn PDF document text
    • http://watusinujebisu.rf.gd/how_social_learning_theory_works.pdfIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/nidisifotajedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22F7A 5644 bytes
SHA-256: 918b7976e1af82dd4ff18d725dcbd43c831792beecefe8947484fe986d05da5b
font_01_sfnt_off000242b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x242B8 10912 bytes
SHA-256: 5a50036de2dedbee92fda4e152ea6624b123e50c44ece1e0ccb14ccb1e47053e
font_02_sfnt_off000267c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x267C8 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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