Malicious PDF — malware analysis report

Static analysis result for SHA-256 a976ddfb230bf51c…

MALICIOUS

PDF

71.5 KB Created: 2021-06-04 05:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1c1216de21da170bf798610e19296919 SHA-1: 52c90e3eeac5aa970f0ba98d1dc982d8cd17b094 SHA-256: a976ddfb230bf51cbf30dfd6e6babb5fc00a623cc7186fad3765f80586000252
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 0.9997

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://oniceh.ru/pbw?utm_term=broan+range+hood+fan+stopped+working PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475999/normal_5fc872ba6c2ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476420/normal_6030414923c42.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/cb231925-5757-43c2-917c-5441cd950db3/substrate_concentration_vs_reaction_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b54b4ce3-a3c5-4cd6-a751-1b68d7828b93/one_punch_man_list_of_characters.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144412557/download_driver_amd_radeon_hd_6400m_series_hp.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/w/file/fetch/144480177/how_fix_dx11_feature_level_10.0.pdfIn PDF document text
    • http://lomubel.pbworks.com/f/37990975555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2856a7ce-1c51-46bd-9c6d-f297e0dea045/pubik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77114aa-14d7-4ff2-a1a3-443aea3d7e7d/tabotipodorulirag.pdfIn PDF document text
    • http://nowefuro.pbworks.com/f/68347529099.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/solved_arabic_characters_are_disjointed_and_reversed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c2a8b1b-16e0-4f6e-af96-8f220134cb02/someone_like_you_chords_easy_ukulele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c75d2ada-7598-4f58-8931-aebee99a1c98/can_you_sail_from_the_atlantic_to_the_great_lakes.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/umuc_ifsm_201_excel_project_1_rental_cars.pdfIn PDF document text
    • http://wamotarirup.pbworks.com/f/1556172420.pdfIn PDF document text
    • http://giribuv.pbworks.com/f/15075926185.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/75044878158.pdfIn PDF document text
    • http://junerew.pbworks.com/f/what_is_midday_in_24_hour_time.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00ff2c1e-40e8-499c-9ee2-0283a34bcdf2/2_dnem_tanzimat_iir_zellikleri.pdfIn PDF document text
    • http://sutodoromar.pbworks.com/w/file/fetch/144489729/duxov.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_off0000d8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C3 5476 bytes
SHA-256: a5277fb3adbeacf95a082aeacb36d8d9acb868bddf45850301af9e223e5e3694
font_01_sfnt_off0000eb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB78 10936 bytes
SHA-256: 42873f6541391417f9b9552844772bb4e2649761c5b4fe804531e78b1a823d4d

Open this report in the interactive analyzer, or submit your own file for analysis.