Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59194fe31b7f675…

MALICIOUS

PDF

92.6 KB Created: 2021-06-13 03:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0f863b793c3f9f45d44f2ad0df5ecd24 SHA-1: b75bd361f1c9b164f7423160e5d92fedefb50cbd SHA-256: b59194fe31b7f67511d5b06ab5103574fe3c216b0807e2395c828bea8ee35a8a
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://laborke.ru/pbw?utm_term=yin+yoga+ankle+stretch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447087/normal_6054161eb9756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5ff5a1b5f0c44.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/aaaa685e-e2db-4671-9ad6-8f453b5ae1bc/best_budget_olympic_weightlifting_bar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01e7ebd1-5033-46c7-a429-3e77ab5f5d87/horton_hears_a_who_katie_plush.pdfIn PDF document text
    • http://litorabi.pbworks.com/f/como_alisar_el_cabello_de_forma_natural_con_maizena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8415590-1593-4612-bfbf-a329812f4869/did_william_afton_kill_his_daughter.pdfIn PDF document text
    • http://vowijeve.pbworks.com/f/whirlpool_imperial_series_self_cleaning_oven_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181f4a1c-1fcd-4d5c-9127-37dacd2b5c3f/teluzowovuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2402117f-57d6-48ca-bbaa-e1abd998a240/38244379698.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec65686b-45f7-4f8c-89f6-ce269cfecd92/37628092365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0ece0e-18c1-4915-9bd3-c6a2f65f72ce/pippi_longstocking_movie_1997.pdfIn PDF document text
    • http://degenazi.pbworks.com/f/msp_cheats_2021.pdfIn PDF document text
    • http://dawijunegolo.pbworks.com/f/gazekalepakedozoxulolexa.pdfIn PDF document text
    • http://lerepaxa.pbworks.com/w/file/fetch/144585060/asap_rocky_album_2020_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde91b00-5c8c-466f-89eb-ee5a5d81db6c/naxun.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/f/sobagorilalufaxaxewuf.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/144603525/neteg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e8966e-3b90-4f2c-a55a-2aca02dc8c6e/i_cant_login_to_my_asus_router.pdfIn PDF document text
    • http://filijego.pbworks.com/w/file/fetch/144853005/organic_chemistry_as_a_second_language_5th_edition.pdfIn PDF document text
    • http://noxixap.pbworks.com/f/how_to_setup_centurion_remote.pdfIn PDF document text
    • http://vibevekofano.pbworks.com/w/file/fetch/145078647/omegle_free_random_video_chat.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_off00012cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC4 5188 bytes
SHA-256: 2268616849d2498dd4bdb789afdaa2dd757cc125ca73f999fbaf13d72d656b79
font_01_sfnt_off00013e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E74 10860 bytes
SHA-256: b63ac1a17905c30be42760e483ff1acedf73a182ff5a82ff9b73664e3c30f88a

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