Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8795a03e502523…

MALICIOUS

PDF

84.6 KB Created: 2021-03-15 04:48:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5fc9351cf37133a59be31f23cb97ccda SHA-1: 068b1a60f22dd1a87613ab7f21ec15fd7459d3c4 SHA-256: 8c8795a03e5025238fed46ffabc3693d93a03c4fe88a1051c6c860543413e374
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that points to a suspicious domain, likely intended to host malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to web development topics, aiming to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/wix?keyword=html+listbox+onchange+event PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481411/normal_60451e1575da9.pdfIn PDF document text
    • http://hyipinvest.site/samsung_55_inch_ue55nu7300_smart_4k_uhd_curved_tvl0zon.pdfIn PDF document text
    • http://fibisazorowax.mypressonline.com/82614151037.pdfIn PDF document text
    • https://cdn.sqhk.co/fowoleleda/PheRgeG/strategy_games_free_play.pdfIn PDF document text
    • http://zanartcc.net/59857042707qsm6.pdfIn PDF document text
    • http://adr-media.work/womasofukymbik.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/67303443741.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494146/normal_604b9b42539cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459641/normal_5ffbe30aefd21.pdfIn PDF document text
    • https://cdn.sqhk.co/guvelebul/ZTqifHG/kung_fu_master_nostalgia_critic.pdfIn PDF document text
    • http://firstdoctor.xyz/dell_latitude_e5400_battery_replacementdwonv.pdfIn PDF document text
    • http://trellos.fun/urgent_non_urgent_important_matrix_templatek325g.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/B9cdegc/light_up_christmas_wreath_costco.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489724/normal_5fdb57363dd38.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/bejokazemur/kurama_fire_festival_japan_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/stand_by_me_lyrics_in_spanish_and_english.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/microsoft_analysis_services_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/atex_zone_1_android_tablet.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/auto_images_in_outlook_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/bugivatefiju.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/lupisolokasajemokiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/ladies_platform_shoes_uk.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_off0000fd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD92 5348 bytes
SHA-256: ee8239adb0c5278895894e75ce670ca0d06e3fdcad7f1f6eee2b8be5e1229f17
font_01_sfnt_off00010fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA8 22592 bytes
SHA-256: 889f35f1757a7d7d99c34c9b127f324e2f8c5f156922ee12414914a23174cf6d

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