Malicious PDF — malware analysis report

Static analysis result for SHA-256 2313e581c9a75b2c…

MALICIOUS

PDF

81.0 KB Created: 2021-02-27 10:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 342e7f10f3e87cbded37f593589a4200 SHA-1: 8145d38049f3adbe6ea16335b64d5f764c550fab SHA-256: 2313e581c9a75b2ca04531bfb8e7622998915d4fc1e064234a5144480cb306bd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain search-related terms, suggesting a lure to a malicious website disguised as search results.

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://botokaw.ru/123?utm_term=canon+speedlite+430ex+ii+price+in+sri+lanka PDF link annotation
    • https://cdn.sqhk.co/devisofage/zhe6jie/langrisser_1_and_2_remake_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/if7gjib/game_grumps_sonic_boom_animated.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/ihol67v/kick_the_buddy_free_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/widafopaj/gjxhgih/r_t_g_s_long_form.pdfIn PDF document text
    • https://cdn.sqhk.co/tifisizeliz/ighficF/rank_makers_tracker.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/iigLtLx/53137036916.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5fddf5531fbc7.pdfIn PDF document text
    • http://xilegutopeza.22web.org/73102675510.pdfIn PDF document text
    • http://pajodumu.22web.org/wiliv.pdfIn PDF document text
    • https://cdn.sqhk.co/wakewafo/djbjcys/benone.pdfIn PDF document text
    • https://cdn.sqhk.co/xizemeginu/1Oq3ghC/five_nights_at_freddy_s_disney_movie_trailer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://puwagof.rf.gd/broiler_farming_project_report_1000_birds.pdfIn PDF document text
    • http://xapimiwosusuv.epizy.com/nosufijeduka.pdfIn PDF document text
    • http://ziwitiko.epizy.com/268486260.pdfIn PDF document text
    • http://wobemiko.epizy.com/84055165238.pdfIn PDF document text
    • http://silapopo.epizy.com/mefozub.pdfIn PDF document text
    • http://sofidusujewa.epizy.com/43306551516.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 5404 bytes
SHA-256: 717b73c86496bf058723ef6f90f111a972c531335f22a6fa021328085bd5ea99
font_01_sfnt_off000101bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BB 11324 bytes
SHA-256: 59dd8b296f6f214c63560e43cf9bbcc8d32708c2f3b3840dfb3b3b65a7f616bd
font_02_sfnt_off0001284b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284B 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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