Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c0d7946745fc42…

MALICIOUS

PDF

74.1 KB Created: 2021-03-15 16:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 31d1b888148a05254506a42ba9f57b77 SHA-1: 74cf136587130e07b9244f9ec330b7a23bac6cd4 SHA-256: d4c0d7946745fc424bc7b895dada8e8dde9ef21745c07c822e9ec8fefc67c29e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=rock+valley+conference+2020 PDF link annotation
    • https://nufivoba.weebly.com/uploads/1/3/4/0/134017608/ziforafudexolomi.pdfIn PDF document text
    • https://pikulevixabokof.weebly.com/uploads/1/3/1/6/131606248/a763d042f58d57b.pdfIn PDF document text
    • https://vilofezilo.weebly.com/uploads/1/3/0/7/130740065/5723187.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://s3.amazonaws.com/midipes/apple_corporate_social_responsibility_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f27976-cf5b-4a2f-9207-d357378a244e/charles_dickens_a_christmas_carol_animated_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbe3d36-4aa4-462d-b990-6fd51b5d30cb/nutaranim.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/53154750993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c88909c-fe74-4127-afb9-ab5f54d12b8f/nelco_sewing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63131797-a236-4099-acd2-3738c9797d30/43321658954.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/cash_flow_budget_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce28dec-669e-4d48-8efa-0ffb5d93a050/jijewesisadopera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ebd35b3-b1f6-43b2-b75f-dfa50dc3b659/general_merchandise_retailers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a589dd-7508-432e-95e9-57608e04aff5/ver_la_ciudad_y_los_perros_pelicula_completa_online_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/yalla_shoot_apk_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a95273-1136-4751-81f4-f63ca8466a3e/what_are_the_30_stocks_in_the_dow_jones_average.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/mental_concepts_or_templates_that_intuitively_guide_our_perceptions_and_interpretations_are_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b58ca82d-eb5a-4a98-bfe2-1f1c42d2812a/romeo_and_juliet_1996_full_movie_english_subtitles_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/cch_s_dng_gsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/gigigovemaxoxes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a283258b-cfef-4702-9519-190d1606b0bb/antonio_gramsci_theory_of_hegemony.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a407c2e-e659-42b2-b1c9-021acbc78bc5/d_link_dir_615_nur_als_access_point_einrichten.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_off0000d8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FB 4864 bytes
SHA-256: 6f1caa5ed7dfda78de89a64512f252ee932325597c8b19feec74108d7e47a632
font_01_sfnt_off0000e991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE991 10520 bytes
SHA-256: 8435eea630fd30b41a7b3564bfc82e5c3c818eab3e10d4e528cff86ffd85a0aa
font_02_sfnt_off00010cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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