Malicious PDF — malware analysis report

Static analysis result for SHA-256 faca91a3e3ce0bb9…

MALICIOUS

PDF

76.0 KB Created: 2021-04-06 23:28:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a0e4f3d017a49eecd1b2ee49e158668c SHA-1: c180af03c966377be219dc406d33a52c9c68df45 SHA-256: faca91a3e3ce0bb9d3d0573671d8f944ce2903d62b117f7a52ff625b66c5d37b
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'Al quran terjemahan per kata pdf', likely to trick users into clicking the malicious links.

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://jacksth.ru/award?keyword=al+quran+terjemahan+per+kata+pdf PDF link annotation
    • http://tijukilebag.getenjoyment.net/64513987541.pdfIn PDF document text
    • https://wumuretulax.weebly.com/uploads/1/3/4/2/134235352/7746150.pdfIn PDF document text
    • http://fimuvukabiwijad.22web.org/budilesaruwobokibun.pdfIn PDF document text
    • http://femaxewife.getenjoyment.net/52787953668.pdfIn PDF document text
    • https://bulugigedi.weebly.com/uploads/1/3/4/7/134714886/4186738.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/21716725622.pdfIn PDF document text
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/moxodevaga-gefaxesaw.pdfIn PDF document text
    • https://mejoraxu.weebly.com/uploads/1/3/1/3/131380998/d56ed1c.pdfIn PDF document text
    • http://kawafopi.mygamesonline.org/zewiwulejolaniba.pdfIn PDF document text
    • http://jixoxegige.iblogger.org/forer.pdfIn PDF document text
    • http://gimerixifaxet.iblogger.org/amman_songs_veeramanidasan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fajixe/monaco_city_information.pdfIn PDF document text
    • http://sajulugebimisu.myartsonline.com/convert_to_word_free_online_converter_without_email.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/ana_seedfolks.pdfIn PDF document text
    • https://989eff4c-946f-4221-9817-1a8d60f2082d.filesusr.com/ugd/7edf14_b67ec8058dd142e383151453f6e063d0.pdf?index=trueIn PDF document text
    • http://zaxuzut.atwebpages.com/ordinal_numbers_worksheet_esl_adults.pdfIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/5_love_languages_mens_edition_free_download.pdfIn PDF document text
    • http://xamukipadu.myartsonline.com/joint_stock_company.pdfIn PDF document text
    • http://bopewexe.onlinewebshop.net/chuyn_file_sang_jpg_online.pdfIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_52a86816b5c04d0a985f172521888147.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 5356 bytes
SHA-256: 8376ca4ad4e5fd4b1c760231a4b56ca53e8efe6d58a98052457862dd05113f64
font_01_sfnt_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 11072 bytes
SHA-256: 623d69cecc913ef934684909ce38d2c38e1c1fedbc5e779f069e3b3d7005513a

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