Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ebf32ad4328dcb…

MALICIOUS

PDF

84.2 KB Created: 2021-03-20 16:12:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 040f2a537f41f5adfc07aa93eb502916 SHA-1: 886721cd0801a6f1370ed1586344c8f2e9d25828 SHA-256: 85ebf32ad4328dcb8fac9f69332f752b6fad77bab41e932ad59aa447ab7c12c8
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://dugedepap.ru/award?keyword=bag+design+fashionary+pdf+free PDF link annotation
    • http://ziwewixowele.sportsontheweb.net/31327488109.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/how_to_get_an_autodesk_student_license.pdfIn PDF document text
    • http://probkin34.xyz/16535405736umksq.pdfIn PDF document text
    • http://zutelotojenexop.getenjoyment.net/soxunarolusakovagadak.pdfIn PDF document text
    • http://detonic-buy.website/animation_books_for_beginnersm9o9a.pdfIn PDF document text
    • http://sendgrid-de.com/jupyter_notebook_togb3nm.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/why_are_my_keyboard_lights_not_working_mac.pdfIn PDF document text
    • http://profyhouse.ru/97400744753b8l1f.pdfIn PDF document text
    • http://xofelivigavas.mywebcommunity.org/wojijefarolotugufor.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/vutotipubeto.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/el_bullying_escolar_causas_y_consecuencias.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/51439390980.pdfIn PDF document text
    • http://sportita.fun/bivuzoxumiteteg9xac4.pdfIn PDF document text
    • http://nadahul.ru/iso_31000_risk_managementeobx1.pdfIn PDF document text
    • http://gebevojika.mygamesonline.org/confirmation_bias_psychology.pdfIn PDF document text
    • http://topfrag.rip/378839395908fnis.pdfIn PDF document text
    • http://rubisteq.online/formal_business_apology_letter_formatuvve5.pdfIn PDF document text
    • http://losqutoq.online/83452121260gwyeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e0529b0e-ffd4-46ae-8a9e-348c3aa8e3ae.filesusr.com/ugd/27320f_f900de316f714ded958f14594f480d45.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_69d213cdc35549f3a2d3302691f62942.pdf?index=trueIn PDF document text
    • http://wutejaxevewef.myartsonline.com/beats_by_dre_studio_3_review.pdfIn PDF document text
    • http://lawiferow.myartsonline.com/xazedonevodibubewagis.pdfIn PDF document text
    • http://sefowolo.atwebpages.com/tepobup.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_off00010bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 5420 bytes
SHA-256: 32c25e3b474ca9a3e44ddffafc0682e0f5965223a880238d0c5c21eab051fc7b
font_01_sfnt_off00011e57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E57 10908 bytes
SHA-256: 1fb404afd8c8312786ab41635ee6ce6fe332b7676966f792f7c6fe5abc76eb71

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