Malicious PDF — malware analysis report

Static analysis result for SHA-256 395e7de1618b004b…

MALICIOUS

PDF

75.3 KB Created: 2021-02-23 01:56:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1adb424e585c220132c320a7278d2138 SHA-1: a5a236b8adab264112ee67b07d2c8d70e4b68488 SHA-256: 395e7de1618b004bce467ba1606a3e47ff96c932779cdf7b65d688737b4cb6b3
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, a common tactic for SEO manipulation and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to movie titles and the wkhtmltopdf application, suggesting a lure to a potentially malicious website.

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://jottigo.ru/wix?keyword=escape+from+cannibal+farm+online+subtitulada PDF link annotation
    • http://idealica-italiaoficial.site/luzevaxuvazozalomani4y0mq.pdfIn PDF document text
    • https://cdn.sqhk.co/nububufi/3Lqeije/hitman_reborn_wiki_arcs.pdfIn PDF document text
    • http://copyrightshelpcenter.com/51953049482sqqa5.pdfIn PDF document text
    • http://topsale.pro/samsung_smt_c5320y2014.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hiijThe/horizon_treadmill_parts_winnipeg.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/kevarogulotdpkck.pdfIn PDF document text
    • http://lunamawel.22web.org/software_development_manager_jobs_remote.pdfIn PDF document text
    • https://cdn.sqhk.co/gisepavuv/N95HhaM/bell_pepper_appetizers.pdfIn PDF document text
    • http://manthoughtswebsite.website/wheres_waldo_scary_bookm12vg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pukadevimetuz.rf.gd/ccs_ba_date_sheet_2019.pdfIn PDF document text
    • http://topajikof.epizy.com/platform_as_a_service_list.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/chuchu_tv_free_for_pc.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 5400 bytes
SHA-256: b52e044faaef8536a81a2bdca571aec491777659f60ae5812464b6a81983f3bc
font_01_sfnt_off0000e920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE920 9984 bytes
SHA-256: 935d8fafd3d5982a27c366f4cd7be8918ceda51262d79720891c986addb3be72
font_02_sfnt_off00010b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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