Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb7314ef24ca79b1…

MALICIOUS

PDF

87.1 KB Created: 2021-04-01 17:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5962d384d5a99261f354f5f14a5e9d5c SHA-1: 15e0cdf62112a6605b223c4a93b4829dd685708f SHA-256: eb7314ef24ca79b1f1cdd2cb84861660d0a4cb0b2c1b5cae4b255774ece96ac8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/award?keyword=betaina+tmg+pdf PDF link annotation
    • http://tvoeobrazovanie.fun/account_form_4_bab_22j9aj.pdfIn PDF document text
    • https://vapesokon.weebly.com/uploads/1/3/4/3/134329795/6084586.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/ddjjgiM/87513580556.pdfIn PDF document text
    • http://sait-ok.ru/78437729476v9zlg.pdfIn PDF document text
    • https://siwusoxol.weebly.com/uploads/1/3/4/5/134584737/6652371.pdfIn PDF document text
    • http://gnfcns.info/what_is_the_best_modem_for_optimum2wtnd.pdfIn PDF document text
    • http://fb-ig-copyright.com/impossible_game_answers_42tuiz6.pdfIn PDF document text
    • https://cdn.sqhk.co/doginifa/bhdiagf/vetifanogum.pdfIn PDF document text
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/xugisoxu_ledavo_pufopoletuxov.pdfIn PDF document text
    • http://idealica-italiaoficial.site/strict_rules_disney_stars_have_to_followy1sq8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bikenuzuxidan.epizy.com/what_is_bai_code_699.pdfIn PDF document text
    • http://xepivuze.rf.gd/makufusatovaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29146831-25af-4b30-8bd8-ef731fbca0ab/zao_an_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1799e6d7-d05b-4776-8e57-060cd3b6b1b1/how_to_put_a_shark_vacuum_back_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1862d403-2de0-415e-b7c5-013211d9e652/63113047712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774271c9-4952-4a5a-8597-fabfcd245967/22855286031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea1423d5-711b-48d9-a17c-708749ae4667/how_to_use_ge_advantium_oven.pdfIn PDF document text
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_ebe3c3b4dde847909dc41652b5738c75.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_ca8d0f4ca4bf4e71a1e2f0c18f5490d0.pdf?index=trueIn 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_off000101a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A7 5104 bytes
SHA-256: 92b8644af5748f2a3b87722987476e4e396e396b0ffd8c8aeeef0c906163ba29
font_01_sfnt_off00011300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11300 11640 bytes
SHA-256: b4c6353ff5138a4a19c80b22a7c99e378739f44138de613d8343b8b9ce597b37
font_02_sfnt_off000139e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E0 16100 bytes
SHA-256: dfdc6983d3c42b81f9741fa6cdceaab3e97c1fbda00e6274acf933e6ff911e94

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