Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78cc19ff215d784…

MALICIOUS

PDF

76.1 KB Created: 2021-05-03 22:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 74908cbad61304d0db75f3dddabf6927 SHA-1: 8b0e1603178952f3653f0f3038927b796c098e3c SHA-256: b78cc19ff215d784d68659f7a9f6b72d650873da99f074ffbf50ceb6b772227c
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 0.9993

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://maypoin.ru/strik?utm_term=how+to+calibrate+google+maps+compass+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fc69180f02e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478125/normal_603a6514e5683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479925/normal_6052a76bc2b13.pdfIn PDF document text
    • http://reawont.online/how_to_study_for_permit_test_in_one_dayw6wt8.pdfIn PDF document text
    • http://zodelem.mygamesonline.org/what_is_the_message_behind_the_national_anthem.pdfIn PDF document text
    • https://cdn.sqhk.co/mowuseparap/ia5Vvji/carbon_health_telehealth_medical_clinics_new_jersey.pdfIn PDF document text
    • http://kufejat.sportsontheweb.net/cat_aptitude_test_questions_and_answers_free_download.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/gedabaledenaxezubobakek.pdfIn PDF document text
    • http://hookup153.fun/call_and_sms_forwarding_app_androidekhte.pdfIn PDF document text
    • http://gnfcns.info/the_great_wave_off_kanagawa_writing_meaninge2hnh.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/xubezozifinera.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/aidrzib/rasuz.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/ZtvoKha/fonekimakozurizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443329/normal_60660e6e4d4e0.pdfIn PDF document text
    • http://gerda-msk.ru/cyberpunk_2077_never_fade_away_car_bugz45ga.pdfIn PDF document text
    • https://cdn.sqhk.co/vuranataxu/fhbjgc6/auto_clicker_for_mac_minecraft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413110/normal_602d681660604.pdfIn PDF document text
    • http://qupieasy.online/23671182417n4s82.pdfIn PDF document text
    • http://motivawka.online/mi_planta_de_naranja_lima_personajes_principales_y_secundariosdp2e0.pdfIn PDF document text
    • https://cdn.sqhk.co/tawibonikigo/lgchjZp/dune_book_christian_review.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/c2bf0f9f-f77e-4eb9-8b4f-17b96f7489df/navy_boot_camp_training_classes.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/30078477440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5512cadd-c303-4d10-a25c-2f5a740bde3a/how_can_i_learn_to_code_for_free.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_off0000eb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB01 5584 bytes
SHA-256: 1f1ab9c55cd114b8e59f8b3e4d4be029fa73c34c6fdc33c2bbc1d4244d982fe6
font_01_sfnt_off0000fded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDED 10824 bytes
SHA-256: df4c7ca79ba9a284cf2b45a1f81f60290f7af2062a39beeb09936c4588266872

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