Malicious PDF — malware analysis report

Static analysis result for SHA-256 fed463a190ac5fd1…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 11:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5f88399dca673be625ff8117867d58fa SHA-1: 5879496073838255c260c798d93d1cd4a254d3f5 SHA-256: fed463a190ac5fd10e06833f1bef494ba52b2483782a7bddeb87e70f9576f8c9
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://jacksth.ru/wix?keyword=civics+and+economics+unit+3+study+guide+answers PDF link annotation
    • http://zonizubiro.getenjoyment.net/figozorolide.pdfIn PDF document text
    • https://bixaguvukimub.weebly.com/uploads/1/3/1/8/131872105/kikoziz.pdfIn PDF document text
    • https://jadamoxor.weebly.com/uploads/1/3/5/3/135344742/9264844.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/najazexa.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/vikanalujutug.pdfIn PDF document text
    • http://zawukinaloluku.sportsontheweb.net/64483861585.pdfIn PDF document text
    • http://kijumubafenu.mypressonline.com/9766238815.pdfIn PDF document text
    • http://dafagaketa.sportsontheweb.net/81356607754.pdfIn PDF document text
    • https://zolopopi.weebly.com/uploads/1/3/3/9/133999976/kowojekeneveselob.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/sobiweveten.pdfIn PDF document text
    • https://fajorisovobune.weebly.com/uploads/1/3/4/7/134752278/kowekezeromit.pdfIn PDF document text
    • http://lexaxak.mywebcommunity.org/preeclampsia_acog_espaol.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/b1b0628c-a673-447b-b528-c620acc1a035/how_to_make_a_dirt_road_diorama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3edddd4-8004-4695-8f7b-491e8d8065b7/formato_de_minuta_en_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc70aa2-1644-4afd-9dd3-84dec8b3eba1/what_were_the_seven_spirits_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e38055-52a3-4f85-8a68-65b5fa81ea3d/wheres_waldo_online_game_free_download.pdfIn PDF document text
    • http://zezofakarol.myartsonline.com/microsoft_excel_2020_formulas_and_functions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b2b35e-2dcf-4c34-b38a-2f627cd25249/sayings_of_prophet_muhammad_in_urdu.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/assertiveness_in_nursing.pdfIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_5415c555f54647f99d66a61e9422e9ef.pdf?index=trueIn PDF document text
    • https://83f018a0-8e49-44f0-b57e-805e464a5f06.filesusr.com/ugd/10a4aa_59950c586aa84280b4001b613d1b1acd.pdf?index=trueIn 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_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 5552 bytes
SHA-256: f3854ec65e13e60ff4c21fad5181d9c67cd263d767613a5742d567fa63cc1929
font_01_sfnt_off0000fdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 11540 bytes
SHA-256: 5d420c29c13af0a859cbabbbfb52ea3ab9fb9fe3dbb4e14bad1db020d5b088aa

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