Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b2c64a34bf120f…

MALICIOUS

PDF

99.8 KB Created: 2021-03-15 15:39:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 60435d5647bc229682a16993f7448f15 SHA-1: 534ed0a62cac03ee4a1edb662c6e75bb5b935198 SHA-256: c0b2c64a34bf120f5e81f95b5e9f36b63b82ad4b1146d132a9c5ec393c6892e9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation scheme. ClamAV detection and ML classification strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=nicomachean+ethics+oxford+pdf PDF link annotation
    • http://stakingyfi.com/snoopy_dance_emoticonk7fe4.pdfIn PDF document text
    • http://samo-katim.ru/jisuzalimovikabjmi9y.pdfIn PDF document text
    • http://mandarin-fruit.space/study_guide_for_fundamentals_of_nursing_care_third_edition_answersensy4.pdfIn PDF document text
    • http://reduslim-ordina.site/sonny_s_bbq_tallahassee_menu_pricessoh6z.pdfIn PDF document text
    • https://kerejokav.weebly.com/uploads/1/3/1/6/131637695/newujino.pdfIn PDF document text
    • https://febufovita.weebly.com/uploads/1/3/4/3/134324671/1461e93a117aa.pdfIn PDF document text
    • http://activa-fb.com/filugezigaxopivupr9bak.pdfIn PDF document text
    • https://vopukuno.weebly.com/uploads/1/3/1/3/131383764/gerezekarujana_famudazo_gogunudoluliti.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/xjegcgI/android_google_maps_directions_intent.pdfIn PDF document text
    • https://xijexarara.weebly.com/uploads/1/3/4/0/134017378/goladimuledafeke.pdfIn PDF document text
    • http://casbah2point0.com/holmes_institute_assignment_cover_sheetbuydb.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/cRxgijj/51194666809.pdfIn PDF document text
    • http://shop50off.info/garmin_oregon_650_vs_750486jb.pdfIn PDF document text
    • http://volosaty100.xyz/20853373993krv0r.pdfIn PDF document text
    • http://dorightunion.com/22725592063uds1n.pdfIn PDF document text
    • https://loxigiberojawi.weebly.com/uploads/1/3/4/7/134770663/ninomub_dirupomij_topifulaz_pebiza.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/8de62b6d-e485-4487-9196-dfa700589bff/is_road_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f90a21f-256b-4383-982a-6ea128a7c4da/silugat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1d9543-fb7f-4c52-b1dc-1aee530a6b54/how_to_clean_filter_on_hoover_windtunnel_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65481be-43cd-4aea-9c55-279e3b0bc626/lusobubotasepitu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddc2ba59-2af3-4730-bf7b-bc85dab1a436/how_to_use_roku_remote_to_adjust_volume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30c6ed5f-5b1f-4809-9b60-b8b80a485644/symbol_ls2208_laser_barcode_scanner_manual.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_off00014b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3E 5400 bytes
SHA-256: 3b10562c66fb28981737d2e628ca9711310393f2e21770f0f002008968efc634
font_01_sfnt_off00015d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D7A 10672 bytes
SHA-256: cee56aaeaf8108a64d3db51928a632d41393546b24bd0999229099140fa4ed4e