Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe792674d4980fdb…

MALICIOUS

PDF

72.6 KB Created: 2021-04-04 02:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 977eb4a2d87ac60a223ed69af391b17b SHA-1: d73491fd63509b83853c426386df957be3f0b67e SHA-256: fe792674d4980fdba1e1645191924f91cb17924b20b2a82ad0f3371b65951a9b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to suspicious or unknown domains, indicating a potential phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to obscure malicious intent. While no scripts were directly extracted, the presence of external URIs and the ML classifier's high confidence score point towards malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/award?keyword=markup+pdf+on+ipad+with+pencil PDF link annotation
    • http://itactical.xyz/lysistrata_sarah_ruden8cf4h.pdfIn PDF document text
    • http://alex-chekalev.com/230512811036g2fz.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/88649250643x76sq.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/rhetorical_strategies.pdfIn PDF document text
    • http://dabobez.22web.org/85337305456.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/xebuvuwov/59728519680.pdfIn PDF document text
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_9d1eb360caa144f08a9f907a7ec6b7aa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cb38b8-dc08-4821-b760-2fd0b91a1f59/tipos_de_bombas_de_vacio_industriales.pdfIn PDF document text
    • http://xakazasaravi.onlinewebshop.net/tutorial_dasar_corel_draw_x5.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/guess_the_song_picture_quiz_answers_telugu.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_945f3e5fd72e4c3eab5def7817048cf7.pdf?index=trueIn PDF document text
    • http://gavawekib.myartsonline.com/vozav.pdfIn PDF document text
    • http://xifawuzegeliwag.rf.gd/63406630001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b68609e-a9df-4213-a15b-c7ad4e67d657/44669355603.pdfIn PDF document text
    • https://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_93bc3c5be2ce46f995ea98945286675c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e53bf09-d4d8-4cb0-8e36-b6ea55d09781/95196237691.pdfIn PDF document text
    • http://pofulokadez.rf.gd/arduino_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2b8278-c372-4fe0-95a6-fc19ca83ea42/20613627344.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_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 5228 bytes
SHA-256: 0f0810ad4362f4ce78fa4e2a67f9cb1fd24f0838443f8409812c8ce1019c082d
font_01_sfnt_off0000f021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 10952 bytes
SHA-256: cffb559a474d8b16ae86e60b8e7ea2fb0beeacd858c566a9a0678af20cb5bfb0

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