Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b401aa83a6dede…

MALICIOUS

PDF

78.1 KB Created: 2021-03-19 22:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 85ab80302eb69c4ea14210aad6f429d6 SHA-1: 8c6a66a8774f1793939197f8aeaa92d8d4b24b2f SHA-256: b9b401aa83a6deded1930df3a82645d874cc542ef626b99a046bf6b11a2d0478
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://vilenefex.ru/123?utm_term=oh+atlanta+alison+krauss+sheet+music PDF link annotation
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/8245337.pdfIn PDF document text
    • http://fazupefejivujuf.iblogger.org/vukaxup.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/verbos_en_ingles_con_pronunciacion_y_espaolq293w.pdfIn PDF document text
    • https://cdn.sqhk.co/tidaxetosi/gfcgihi/zipumodaxekewuf.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/ckjhiik/nature_full_hd_1080p_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417528/normal_60540f9437a8a.pdfIn PDF document text
    • http://odemebayisitrafik.com/xapowddq53.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/bBidIYB/will_hero_online_game.pdfIn PDF document text
    • https://motovonesavot.weebly.com/uploads/1/3/4/6/134690882/xejugu-kezile-fozifolat.pdfIn PDF document text
    • http://tertov.xyz/8757353202yrr8.pdfIn PDF document text
    • http://cashthe.ru/minecraft_crazy_craft_3._0_mod_pack5ykut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_600d4efa61764.pdfIn PDF document text
    • https://cdn.sqhk.co/diwamukef/aw1zW17/geopolymer_concrete_columns_ppt.pdfIn PDF document text
    • https://gojanaribebiw.weebly.com/uploads/1/3/1/4/131437307/rusinemofotuz_losiro_pavivoxumu.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/guzoxa.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/8dddbe9719f.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/how_to_use_lincoln_140_welderu4k6r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sazosubegus.epizy.com/nejagudanupadex.pdfIn PDF document text
    • http://fewuzefar.rf.gd/free_eraser_software.pdfIn PDF document text
    • http://bojibag.epizy.com/netflix_en_mislukt_iphone.pdfIn PDF document text
    • http://rodesodekisivu.rf.gd/arnold_chiari_malformation_patient_uk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE52E 5012 bytes
SHA-256: b9ba6073709054c6898a173999917eeeeff969a3efbf50a939889fe7dfbaef87
font_01_sfnt_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 11540 bytes
SHA-256: 10feb56b076fc126850dcd552158d11ca03aaf7a9e9bb629651fd98b4504c673
font_02_sfnt_off00011cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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