Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d2497adba3f67db…

MALICIOUS

PDF

68.7 KB Created: 2021-02-20 20:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 49a692485c01e7d1ad4e3fdb8823055a SHA-1: 2abc30a657787576d882c02012ccbc2d196baf8f SHA-256: 3d2497adba3f67dba56f0c93f35d1661aee6267d2be544108d5ee2491ab2e638
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with several pointing to disposable hosting, suggesting a phishing or scam campaign. The PDF structure and embedded URIs are indicative of a spearphishing attachment, designed to lure users to malicious sites.

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://maypoin.ru/wix?keyword=caligula+effect+overdose+trauma+quest+guide PDF link annotation
    • http://ashotik.space/yandere_x_male_readernp31q.pdfIn PDF document text
    • http://eagleaff.com/lic_jeevan_shanti_downloadcv0nj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402940/normal_600defa1879c0.pdfIn PDF document text
    • http://umdtheatre.ru/square_body_chevy_truckclgu9.pdfIn PDF document text
    • http://brandframeb.com/nonejiwexidoragosubipekec4ioz.pdfIn PDF document text
    • http://livethailand.fun/masha_and_the_bear_coloring_online_gamesvld6q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449000/normal_5feba14615290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5ffdac6d22d61.pdfIn PDF document text
    • http://mirror-x.org/mor_flo_water_heater_priceo2nha.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_5ff1455d96457.pdfIn PDF document text
    • http://es50off.pro/creditors_ageing_report_in_sapwe0mi.pdfIn PDF document text
    • http://goodshopsales.xyz/13988155359b1yyi.pdfIn PDF document text
    • http://chunyoo.com/willingness_letter_format_to_continue_the_jobnrs1z.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/palikuvexake/mdadm_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/lojuvuxebodoxope.pdfIn PDF document text
    • http://vikuwopijoxu.rf.gd/olympus_om-d_em-1_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/zixixedivuzarozaladof.pdfIn PDF document text
    • http://tuwidapaj.epizy.com/circular_pro_font_family_free.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_off0000d168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD168 5432 bytes
SHA-256: c93b3449f90bfb424de4d53036471c32b2f55e8c51d1badebd4d592b286b3c62
font_01_sfnt_off0000e3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C9 9844 bytes
SHA-256: aad6c4ce3304ce0019491c3910243936f6d08fa334582d42413cdfc94279a647

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