Malicious PDF — malware analysis report

Static analysis result for SHA-256 62557f99f293a513…

MALICIOUS

PDF

72.8 KB Created: 2021-03-08 23:07:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 91d3890c0bb677412fae39eb15e30795 SHA-1: 98fd3d2227bf22203c8ce746de270fcf48efce6a SHA-256: 62557f99f293a5134cca4389388abd00cc6d94c3c191e005c98bc9c20138e2b8
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-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://golowaki.ru/strik?utm_term=toro+power+clear+518+zr+oil+type PDF link annotation
    • http://weinmvc.net/hino_fm1j_workshop_manual59l95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_600e8b30056cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453901/normal_5fdfb5d3bde4d.pdfIn PDF document text
    • http://itravelimpressions.com/219835979570eb9a.pdfIn PDF document text
    • http://lady-bug.club/beautiful_images_hd_free40sip.pdfIn PDF document text
    • http://prodson.fun/alloa_academy_school_uniformiepyd.pdfIn PDF document text
    • http://distornyup.site/circle_of_life_choralcw108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_602b8fd686787.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/kufazete/customer_services_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7bd959-497b-4148-ae2e-d82ccc9bfed9/45399384151.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/53477291751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccf64af-13b8-4565-b222-9265cc0c3c6a/how_to_use_gardners_multiple_intelligences_in_the_classroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f52011e9-b9f6-4f8f-a23c-be952831d48b/que_es_una_foto_digital.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce193b7c-258e-45a8-8fc0-5fbd571e3167/28788880636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325def29-265d-4954-9b0c-eea676c697c5/the_hunger_games_catching_fire_free_online_123movies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4220f82c-7f9b-4d11-9c58-20204e914252/how_to_play_violin_scales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d74110b-a61f-43cb-b810-8eeaf6f28276/anet_a8_firmware_update_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f99a442-9d0d-4926-b900-e17a49142055/singer_sewing_machine_locked_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a4143b4-1c07-4f74-98fe-0ebcddaf3045/vezag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b9ff1d-9d73-4b23-9515-e5476df2fb82/how_to_charge_midland_xtra_talk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dce300c0-2cf3-4f7d-a552-0ac6ce730859/is_kaplan_schweser_good_for_cfa.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_off0000dfb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB9 5312 bytes
SHA-256: cfc7567fda59eb7b8a2b58b173dcbc4924e88c499b1671ab7641bc9f26410549
font_01_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 10068 bytes
SHA-256: 6562a651e4193c00d0ae5dcf43da60297bc1adf6fa14256db715559ecd6ad8be

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