Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f708c95a6bc438…

MALICIOUS

PDF

76.8 KB Created: 2021-02-21 13:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0c4a0cc17d4e8dded1ed5fb3deee848f SHA-1: d3f13bc39b4ea43e89320543ffeaf3888306a2be SHA-256: 54f708c95a6bc438be252431b87ef2c8ff1cc6f15834f516031ed99ba362f616
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it contains an external URI and an SEO redirector link. The link, 'https://bologen.ru/wix?keyword=garrison+wall+air+conditioner+manual', is likely used to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to trick the user into downloading further malicious content or visiting a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/wix?keyword=garrison+wall+air+conditioner+manual PDF link annotation
    • http://1cats.space/arduino_robotics_projects6xzpf.pdfIn PDF document text
    • http://rubisteq.online/zumebipozigokupagodojejowxsmkp.pdfIn PDF document text
    • http://rankingcoach-seo.com/jekigogowefitoloub4yo.pdfIn PDF document text
    • http://uniques.space/meaning_of_budget_line2l9h6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_60070eb9e8fb8.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/OFcie6x/9513787081.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503874/normal_5ff2c4c22d5f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426830/normal_600a1665a965e.pdfIn PDF document text
    • http://price-list.moscow/vegetarian_indian_recipes_snacksxp28q.pdfIn PDF document text
    • http://xivokosu.iblogger.org/38388780926.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/d7Z4H2l/tamil_ghost_sound_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://junimufik.epizy.com/spyder_python_3._6_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/project_kickoff_meeting_email_template.pdfIn PDF document text
    • http://lagunuriteg.rf.gd/how_to_make_aubergine_lasagne_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/tutorialspoint_active_directory.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/ansi_c_compiler.pdfIn PDF document text
    • http://polopurug.rf.gd/do_i_need_an_8_quart_instant_pot.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/accenture_australia_annual_report.pdfIn PDF document text
    • http://kajurilin.rf.gd/68723959274.pdfIn PDF document text
    • http://matasup.rf.gd/witowofipo.pdfIn PDF document text
    • http://wotujemun.rf.gd/kawakami_gift_guide.pdfIn PDF document text
    • http://nodafawujanego.rf.gd/66289693079.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_off0000ef20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF20 5208 bytes
SHA-256: d5f7e9562e9f4988158582705d78d5f673a70a2946d7551cd8fe052cd0c804e5
font_01_sfnt_off000100d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D6 10704 bytes
SHA-256: 3a66ea59ecbd2b0230891c265b93873ce3ac9d13a32bf1c8ad8106b9d2d21a12

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