Malicious PDF — malware analysis report

Static analysis result for SHA-256 12396b4733963e1f…

MALICIOUS

PDF

74.9 KB Created: 2021-03-08 09:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8f29500b74262c35a10b8c050c127cc5 SHA-1: 5661ed4890b84b4248e1d32e18217fe82cde0a9b SHA-256: 12396b4733963e1fd84d605149634c2ddcde4fdb4b0f8b0d4c3b02e09d99bb54
126 Risk Score

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 0.9960

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://leonvi.ru/wix?keyword=naia+dakstats+baseball PDF link annotation
    • https://cdn.sqhk.co/jepogedofuz/ihgg3sG/48888465655.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/jhbrhja/65013558508.pdfIn PDF document text
    • http://kulokozataxat.22web.org/cater_allen_android_app.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/wogoj.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/maternity_and_womens_health_care_11th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/gixotagokezu/ghHgGil/68800445383.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/neGQzih/70s_rock_dance_music_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/rapedipular/6KgijUl/94726687457.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/Lgigjjc/xesoxapusolusumiramur.pdfIn PDF document text
    • https://cdn.sqhk.co/lidumezuvir/ogczmvk/car_battery_jump_start_power_pack.pdfIn PDF document text
    • http://vizilirudigub.getenjoyment.net/kaxilu.pdfIn PDF document text
    • https://cdn.sqhk.co/zapusukajev/fwOt3My/9981954547.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/ThhhMNc/vebete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezajezo.epizy.com/zasefixesojogakunup.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/sudutuwebalilivumuloki.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/tanomubagipemulenibi.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/broilmaster_p3_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/best_android_based_ebook_reader.pdfIn PDF document text
    • http://pejulok.epizy.com/face_app_pro_apk_android_1.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/27079678131.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/mebuvunidu.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/60053734333.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/vowuwijerenipoba.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/carcassi_etudes.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/ribakisopavosavif.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/hells_vengeance_maps.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_off0000e6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D6 4896 bytes
SHA-256: a3cc5b7270299845b295f6a1b4ce579468593aace828674209c91b3b03b40ba1
font_01_sfnt_off0000f796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF796 10908 bytes
SHA-256: 33c8d07e7a2fd8eb2707200156fc9c6bd55425544b78111257e79a4d335ced62

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