Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc8f3de0bf49710…

MALICIOUS

PDF

77.0 KB Created: 2021-06-13 23:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2eb8f887155284085c905d1b2254e878 SHA-1: e22402233c2edc6c61bca8af7b40f94b61dd78ee SHA-256: bcc8f3de0bf49710e737947dfb12c28348494af2c9f78d8d27667f665465451e
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://nomylo.ru/pbw?utm_term=call+of+duty+black+apk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426279/normal_5ff5a312a7358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_6031c6db5a765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486037/normal_5fdbc3a3e0881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_5fd7b73df0ba2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuvumuname.pbworks.com/f/durinadoxetana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35f62b77-85e6-4914-af99-53f905284bd1/drums_of_autumn_chapter_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed458b35-7c98-4729-99e8-5d43cc3fe264/filosofia_ubuntu_livro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/723fafa2-5529-4b61-94f8-ac2ff55984a0/clculo_una_variable_thomas_13_edicin_descargar_solucionario.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/how_to_scan_for_local_channels_on_vizio_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec75031b-a03f-4d8e-81a4-fafc7ea812c3/eyelash_extension_training_fl.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144451050/gorano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd93a876-df83-40c8-a99a-95bb359450a2/percy_jackson_graphic_novels_in_order.pdfIn PDF document text
    • http://jujirafamena.pbworks.com/f/logic_word_problems_with_answers_tagalog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d2babb-b36f-445e-938f-8b6a8c0a2c52/what_do_restaurant_consultants_do.pdfIn PDF document text
    • http://bikopatepo.pbworks.com/f/babi_italia_eastside_classic_crib_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f563b66-0242-4c75-b012-25ac0a7734d2/best_circular_saw_guide_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fdb3c8-f742-46b7-b5b9-7b8d45a9cfa4/luzepizigen.pdfIn PDF document text
    • http://buvevogixud.pbworks.com/w/file/fetch/144770865/gunekubolexobibosoxaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b134a9f-f21a-4763-a666-282540b55d2e/roomba_scheduler_irobot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 5088 bytes
SHA-256: 4f22712fa126568e0053297f629036d3f921bccdac0ccd1b9fc07d5867305ce5
font_01_sfnt_off0000f5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E1 15484 bytes
SHA-256: 3e78634937c888760bd809edb6589dadcefb3f2f4a62e6f1e63625e4abe6b38b

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