Malicious PDF — malware analysis report

Static analysis result for SHA-256 10bada32f4fc54a3…

MALICIOUS

PDF

69.2 KB Created: 2021-02-21 04:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 71506b0df85e4df41e7a7b49f3324549 SHA-1: acc7be4072abf92b69e8c62734a8010178108fbe SHA-256: 10bada32f4fc54a3624be8e1aa7590b1d1f1c8a0c6e79acd106e2d591de13d96
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is indicative of a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=e+b+white+essay+here+is+new+york PDF link annotation
    • https://tematurulabi.weebly.com/uploads/1/3/1/6/131606540/xusuradafunezo_nenuw_julenatafej.pdfIn PDF document text
    • http://xilofomodat.iblogger.org/28954401454.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/jdicMQE/noirmoutier_en_l_ile_property_for_sale.pdfIn PDF document text
    • http://diburawu.22web.org/zofizubuwevawika.pdfIn PDF document text
    • https://cdn.sqhk.co/kezavilageg/gi9RgXz/best_free_online_android_games_2020.pdfIn PDF document text
    • https://sidutoxa.weebly.com/uploads/1/3/4/8/134886075/xunovabibekamexibu.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/0EavSib/need_for_speed_rivals_ps4_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/iaquvUu/61969580971.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/8360246.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/yhjWBy6/cloth_face_masks_for_sale_made_in_usa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://navebulaj.epizy.com/java_8_jdk_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/vutijinusidageji.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/18625444767.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/chatrapati_shivraj_ganesha_dj_song.pdfIn PDF document text
    • http://zefuxaninegug.epizy.com/69286532775.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A2 5096 bytes
SHA-256: 410a133ea294c05f82fd48352c8613cbe835b090d658f64a43ed10672ea1ac36
font_01_sfnt_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 3720 bytes
SHA-256: a7c194c348f4bc26aad06ae1fa1eadf76503a3aca856ff80314c3d87a816eea9
font_02_sfnt_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 9644 bytes
SHA-256: 8f96076689f245091367ba33f6a96683955e7210526ee61863b9937d483e8bab

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