Malicious PDF — malware analysis report

Static analysis result for SHA-256 738acf892fc8142e…

MALICIOUS

PDF

81.8 KB Created: 2021-03-14 07:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86840350e4399c7aac3e77d1655e804 SHA-1: d6b1506051455672cf3fe7286d036edae4af055a SHA-256: 738acf892fc8142e561d777fb56b253ad64d913668845ab16d03013f1e622fd4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, including one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to a watch manual, designed to trick users into visiting the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=timex+wr30m+gps+watch+manual
    • http://eliyalte.com/76998720110cfz5x.pdf
    • https://static.s123-cdn-static.com/uploads/4443326/normal_5fcce7064c313.pdf
    • http://lnstagramlivesupportcenter.com/rezorururowelejixajobumasq9y2.pdf
    • http://idealica-italiaoficial.site/e_tickets_delta_airlinesin5wr.pdf
    • https://cdn-cms.f-static.net/uploads/4408981/normal_60236c07a26e3.pdf
    • http://dayzcommunity.info/is_lithium_oxide_ionic_or_covalentwbuwb.pdf
    • http://metazoaapc.fun/kazugapufuxedatat5ibbf.pdf
    • http://cashthe.ru/24514569694193lv.pdf
    • http://lifeit.pro/romeo_and_juliet_selection_test_answersp8erc.pdf
    • http://lnstagramcopyrightmanagement.com/sesikudopezipulimo4sm4.pdf
    • http://xegazinijitup.mywebcommunity.org/journaux_algeriens_aujourd_hui.pdf
    • http://lavkavkusa.store/realm_grinder_lineage_buildsse3r4.pdf
    • https://cdn-cms.f-static.net/uploads/4450350/normal_601bfc4a384cc.pdf
    • http://zokiwedilar.mypressonline.com/bumedovifujovo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_2571a33f5d0d482eb81378907ee9c062.pdf?index=true
    • http://japamitafixe.myartsonline.com/57958742183.pdf
    • https://564fd4a8-0e6d-4f97-813a-a14a70c45316.filesusr.com/ugd/f90d28_af31567164e74c22a271a14415563ad7.pdf?index=true
    • http://pivimufe.atwebpages.com/how_to_pass_chemistry_120.pdf
    • https://a26b494c-4f54-4b9d-aaa3-e02d462d315a.filesusr.com/ugd/c6268f_1c980fe176f74514afa414f8171ce993.pdf?index=true
    • http://gixarewujedel.atwebpages.com/6775432660.pdf
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_3853de1682184331b07f40a3031a8847.pdf?index=true
    • http://tososite.onlinewebshop.net/american_girl_felicity_short_stories.pdf
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_e2a2437b6fc84f278d996edc4e3e0559.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000102b9.bin
6b399569ddd92a2803631052f903b377c7da12b8f6df4e93e0534e8a00437908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102B9 5760 bytes
font_01_sfnt_off00011643.bin
871e176397d09b9e5122f0d4068ed4cdd8d617fa2c2f160d019f29d0b4036f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 10364 bytes

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