Malicious PDF — malware analysis report

Static analysis result for SHA-256 732339e767c9a8f0…

MALICIOUS

PDF

80.2 KB Created: 2021-03-14 06:50:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 396a263c2db471997077b0bf462b6d78 SHA-1: 9c684acf7e066069f260df1ad841af018e044ec1 SHA-256: 732339e767c9a8f0242c7d4673b7bd5b217b87272e7149262e034bcaae7f43c4
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' indicating a large number of outbound links. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly suggest malicious intent, classifying it as a phishing or trojan PDF. The embedded URL 'https://botokaw.ru/123?utm_term=cute+calendar+app+android+free' further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://botokaw.ru/123?utm_term=cute+calendar+app+android+free PDF link annotation
    • http://varistop.site/godunewensyey.pdfIn PDF document text
    • http://tells.fun/como_dibujar_a_goku_ssj_diosvo00g.pdfIn PDF document text
    • http://bbflowers.net/7792509638n0myu.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/3ggEeuk/kuvopugabomafafabawawefo.pdfIn PDF document text
    • http://repair-telefonov.ru/348674807184cvmy.pdfIn PDF document text
    • http://presente-top.store/far_cry_primal_ps4_trophies_guide5kyap.pdfIn PDF document text
    • https://cdn.sqhk.co/wekaradukuve/KLhanAu/33989818414.pdfIn PDF document text
    • http://newser.site/the_book_of_enoch_the_prophetcvoox.pdfIn PDF document text
    • http://blancop.xyz/sony_xplod_1200_watt_2_channel_ampl61ja.pdfIn PDF document text
    • http://complect-tech.ru/martin_lings_muhammad_reviewmtw1p.pdfIn PDF document text
    • http://eurosett.net/warhammer_40k_chaos_space_marines_codex_4th_editiona7fdk.pdfIn PDF document text
    • http://fullcreditreport.info/android_canvas_draw_text_boldueas3.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/AiejgWo/kodi_builds_for_xbox_one_18._5.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
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_54dc488fc9384a50bb6a9c781e8a2553.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/35205923308.pdfIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_a39b3aa53c30450ba515d03010136822.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/6779867221.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/is_there_a_small_business_grant_for_covid.pdfIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_43870b2fdada425fac4c6521b20e3749.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fovezewi/zabutixinubumi.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/how_to_reply_charge_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ziwuvijevo/xerenomanobunewuwudowox.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/bass_boosted_hip_hop_songs.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_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 4876 bytes
SHA-256: f500e38a81bd955e1ce3d251e2137ca8507a058ac7bfa1bcd6ba377a0d957ab2
font_01_sfnt_off0000ffa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA8 10560 bytes
SHA-256: e2d8c6cfd0f874d477eca3430d2eaa2e28d351883fc42e635663c275565e1245
font_02_sfnt_off000123ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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