Malicious PDF — malware analysis report

Static analysis result for SHA-256 650baa5fd3233b20…

MALICIOUS

PDF

77.5 KB Created: 2021-03-04 08:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b8799aec5f71887b1c910da61c434ca3 SHA-1: a5b4420d8080e9ae9802e53e5fcb8ddda3d81390 SHA-256: 650baa5fd3233b20eb203f811832af0ff78f58fe250238fc93f73f214dac29b6
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as potentially malicious and flagged by ClamAV. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'tea quotes', likely a pretext to disguise the malicious intent of redirecting the user to the external URL for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=let%2527s+have+a+cup+of+tea+quotes PDF link annotation
    • http://winovigamaj.mygamesonline.org/13483248690.pdfIn PDF document text
    • https://jetijejage.weebly.com/uploads/1/3/4/3/134319548/mazupurisunididivaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_60176b615fe09.pdfIn PDF document text
    • http://tofoxewesaxizuz.mywebcommunity.org/brother_mfc_7860dw_print_configuration_page.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_603ea2929b715.pdfIn PDF document text
    • http://rcasino.info/mebefoxuderufavodhjqaw.pdfIn PDF document text
    • https://diritirafimiwav.weebly.com/uploads/1/3/4/3/134376035/921debf36f0cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffd283974a19.pdfIn PDF document text
    • https://xaziribubeka.weebly.com/uploads/1/3/4/3/134397614/6622411.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/toner_for_brother_mfc-8710dw_printer.pdfIn PDF document text
    • http://scoretdho.best/shark_navigator_dlx_or_lift_awayxlvst.pdfIn PDF document text
    • http://rotiwopofeze.mywebcommunity.org/what_events_occurred_between_1850_and_1900.pdfIn PDF document text
    • https://noxajigaja.weebly.com/uploads/1/3/4/6/134698193/tezekopu-mupima.pdfIn PDF document text
    • http://ueuniti.xyz/42374830476ceqbt.pdfIn PDF document text
    • http://dreabling.online/shortcut_run_as_administrator_registryy6pfz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463803/normal_5fdcdc6b45c6b.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/jubiferekaka/stock_market_futures_for_tomorrow_morning.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/wasteland_2_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/half_vampire_5e_race.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/astro_a40_tr_firmware.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/wajepizidizuna.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/nijaxewunezefutinipuf.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_off0000f1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E0 5136 bytes
SHA-256: 71292baa3bc4358fc50708ad4594061c015d330fc68fe8600999f641c81aad03
font_01_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 10752 bytes
SHA-256: dc6e6ea6542a47781a4cc124aa485d08c8f1e2d6e86b5ffb6b7878cbd42d483b

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