Malicious PDF — malware analysis report

Static analysis result for SHA-256 d267368b663c3121…

MALICIOUS

PDF

104.3 KB Created: 2021-02-24 07:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b5333167fb16fea6504af59edf1ea6d SHA-1: b49e79ef230c78e63d24dee6598d60b67cfabfbb SHA-256: d267368b663c3121f6b2725f6d81f7724b563ee8297b97d597bff2e331baef27
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/123?utm_term=great+american+songbook+sheet+music+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5ff7741c3358a.pdfIn PDF document text
    • http://mysteps.online/starships_of_the_galaxyjb0xu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5fd647878d9d4.pdfIn PDF document text
    • http://repaircreditscore.info/72089712808vq17r.pdfIn PDF document text
    • http://lasozenixirek.iblogger.org/how_do_you_adjust_the_hands_on_ag_shock_watch.pdfIn PDF document text
    • http://copyrightshelpscenters.com/joralumejubanedajubaji483ab.pdfIn PDF document text
    • http://com-signto6.xyz/chrono_trigger_level_guidemewjd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_60026ab5356e4.pdfIn PDF document text
    • http://natnat.fun/gilakowagulanusagagelixapgu8gr.pdfIn PDF document text
    • http://agentsecure.space/norwegian_english_dictionary_download_csv1a3wj.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/vonuxagupeduze/layers_of_the_atmosphere_drawing_worksheet_answers.pdfIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/love_and_respect_quotes_for_her.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/whatsapp_free_iphone_apk.pdfIn PDF document text
    • http://fedagobugunuxi.rf.gd/how_big_was_each_army_in_ww2.pdfIn PDF document text
    • http://popuzavefigud.epizy.com/pedajadetij.pdfIn PDF document text
    • http://nodefojabotozij.rf.gd/kunagibumaku.pdfIn PDF document text
    • http://penevebepor.epizy.com/58396992228.pdfIn PDF document text
    • http://kuxoxulid.epizy.com/how_to_use_proform_treadmill_without_activating_ifit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000159f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159F9 5760 bytes
SHA-256: 4c5a313e441260ad13c8862de53ccaa5de621e8a9bcc499659b7a6a0e65d47d6
font_01_sfnt_off00016d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D78 10640 bytes
SHA-256: d753028590530e8a904a20d2716e7d00b49e5fe3b9fabe1ec321d08eccff7066

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