Malicious PDF — malware analysis report

Static analysis result for SHA-256 7214b6d48d7ea92f…

MALICIOUS

PDF

75.3 KB Created: 2021-03-18 08:20:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b6716b1a99ecf4afa69f89bd793afc6a SHA-1: 315216fc02beadd82cee81c3bc256846fd140c5e SHA-256: 7214b6d48d7ea92f1f2055d0a87663b3a4fdd96279e3dbf47f44076dba7e3c2b
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=critical+thinking+interview+questions+and+answers+pdf PDF link annotation
    • http://kefijor.mygamesonline.org/what_are_the_different_stages_of_reading.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_6003cd9184545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474475/normal_601569477bcda.pdfIn PDF document text
    • http://lozejebivo.scienceontheweb.net/giwotodumutofesijozoben.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481662/normal_5fd29bebb8bdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370307/normal_5ffb1acba2299.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/affinity_designer_workbook_free_download.pdfIn PDF document text
    • http://smartline58.ru/20_kw_kohler_generator_wiring_diagramrfexu.pdfIn PDF document text
    • http://worldworkbook.com/swiffer_wetjet_wood_not_spraying60b6c.pdfIn PDF document text
    • http://rinujajija.getenjoyment.net/zebofisusejofavewetevu.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/calculus_10th_edition_anton_bivens_davis_download.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/46208a6a-8414-450a-87be-552add6cd7ed/where_to_get_the_book_of_enoch.pdfIn PDF document text
    • http://rawurokavuxari.rf.gd/42893125530.pdfIn PDF document text
    • http://jabaxuzadowepep.rf.gd/finowuwus.pdfIn PDF document text
    • http://paravejurozekoj.epizy.com/2007_ford_f150_alarm_wiring_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4081187b-56b3-497b-9833-0e5bdb4d2e8e/77490566003.pdfIn PDF document text
    • http://vutegug.epizy.com/soluce_new_super_mario_bros_2_switch_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ef2e8b4-4f80-4dde-a1fb-7f4fd3850591/2026043920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45d1b7ec-c491-4665-a1ba-fbbd2ff8fe25/telafakidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14466aac-2891-4613-8486-5446bd7ff459/how_to_fix_a_frigidaire_upright_freezer.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_off0000eb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB08 5664 bytes
SHA-256: d95026d8e18793135184487a36585664afeab21f2e7dd9fc0d7394f30a10146d
font_01_sfnt_off0000fe4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4B 10100 bytes
SHA-256: 4a91af79b6f803aecd41bc63643b2692b764f076dc79e6e2d11370ca4a4bf3a8

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