Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e4edbd1e855a16…

MALICIOUS

PDF

76.5 KB Created: 2021-03-29 05:02:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 11601a677cd9131c22498d3c9514f45d SHA-1: 5e4806c57acf9075cd6b78235d5cd8fc164d75eb SHA-256: f6e4edbd1e855a16fd0139bba47a96b867d6ca24b5df128b072b6d605dc91696
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one prominently featuring 'vpn android apk mod', suggesting a lure for potentially unwanted software. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution attempt, likely leveraging a known PDF exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/123?utm_term=vpn+android+apk+mod PDF link annotation
    • http://dafesoxexigu.medianewsonline.com/rogufumifil.pdfIn PDF document text
    • https://cdn.sqhk.co/gorusuvu/kia0idp/kobaneguvomobukumawob.pdfIn PDF document text
    • http://vanlit.ru/kukokusoxopo77zdy.pdfIn PDF document text
    • https://metiledozixav.weebly.com/uploads/1/3/1/1/131164016/sozoseri.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/hehf5eo/kung_fu_ball_apk_mod.pdfIn PDF document text
    • https://gubotejulide.weebly.com/uploads/1/3/4/3/134380330/6346aec2237.pdfIn PDF document text
    • http://waranijovuv.sportsontheweb.net/20616252729.pdfIn PDF document text
    • https://sodamosubiduv.weebly.com/uploads/1/3/4/0/134012739/kivijirelajov.pdfIn PDF document text
    • https://mizunemaki.weebly.com/uploads/1/3/4/8/134850414/1839472.pdfIn PDF document text
    • https://cdn.sqhk.co/laxiroroweno/fidowjb/zosugufanazut.pdfIn PDF document text
    • http://spencermcman.us/tomodachi_collection_english_romlt0vy.pdfIn PDF document text
    • http://tijesusugumuka.iblogger.org/37705894530.pdfIn PDF document text
    • http://dudosawiroti.22web.org/85309858558.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruzofugeru.myartsonline.com/30_planos_arquitectonicos.pdfIn PDF document text
    • http://kepunebo.epizy.com/how_to_take_a_permit_test_online.pdfIn PDF document text
    • http://savekuf.rf.gd/britax_marathon_clicktight_adjust_shoulder_straps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0fcf50-bc71-46e5-a981-9246f7127031/zewiniw.pdfIn PDF document text
    • http://daximogosamov.myartsonline.com/b._s._shah_prakashan_books_free_download.pdfIn PDF document text
    • http://riveminigokoxa.myartsonline.com/chaitanya_charitamrita_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5fe213-e405-48bb-b1f4-e165bdb30e6e/jurovet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbcc00d4-6708-4e57-b03b-53255f5907a1/thoth_tarot_deck_card_list.pdfIn PDF document text
    • http://demunoj.epizy.com/google_sheet_countif_wildcard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/249c22d0-8736-4267-87a0-198ac3e6dbc3/dasedi.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_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 4924 bytes
SHA-256: 159c80a639fdaad3a02e1925f420c493b5519c596f7929c36ee6ed228a19ae34
font_01_sfnt_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 10564 bytes
SHA-256: 0077c920a60f9a9c61104b3173331532b7e4e7545852bd753a2ee664949fbe3d

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