Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e804b07879ce164…

MALICIOUS

PDF

85.4 KB Created: 2021-03-23 04:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 10d18aabbcb657972e8eaaf11313a5ba SHA-1: b694e113358608ff3fbc076c64fb7cf24af55fdc SHA-256: 2e804b07879ce1646a3ca7c479f03b6df43c6bfa171437d083ab3b4dec877c3f
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 0.9995

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
  • 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://druttle.ru/123?utm_term=beauty+plus+photo+editor+app PDF link annotation
    • https://cdn.sqhk.co/legusovej/aSXibl2/towinarif.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/OfsfghP/lapedifoxeder.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374178/normal_6050bc7b70906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_6029629d2ad16.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/hehbfc3/61270109828.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/hcaHyhh/39581351952.pdfIn PDF document text
    • https://cdn.sqhk.co/pomisiforuko/hhefnjj/36591773429.pdfIn PDF document text
    • https://cdn.sqhk.co/dobulefipuji/haFihJK/websites_that_give_free_robux_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/fakameratexe/eAgcgjn/13138407576.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5fda2ab79044d.pdfIn PDF document text
    • https://cdn.sqhk.co/kinifukix/jehcCgi/toxivetimasirol.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/whhegdH/43934319842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zemodisiriv.epizy.com/idm_crack_karanpc.pdfIn PDF document text
    • http://zuvineduwofuxo.epizy.com/balanced_chemical_equation_examples.pdfIn PDF document text
    • http://givimuvupavu.epizy.com/lijubowarijaxanotorofuzom.pdfIn PDF document text
    • http://xegiseko.epizy.com/benham_falls_fishing_report.pdfIn PDF document text
    • http://fexajorijoworas.epizy.com/29501214806.pdfIn PDF document text
    • http://noworevapetero.epizy.com/six_sigma_black_belt_study_material.pdfIn PDF document text
    • http://pokogasojogev.epizy.com/bitwise_operators_python_performance.pdfIn PDF document text
    • http://kugefosames.rf.gd/adani_enterprises_annual_report_2018-_19.pdfIn PDF document text
    • http://xabiworaw.epizy.com/pojilazizebozagonijisotaf.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
    • 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_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 5200 bytes
SHA-256: 2ca106840c33f521a5ef9d874025068b9880cf77942b4fa89662e7c303f08ad5
font_01_sfnt_off000107ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AC 12832 bytes
SHA-256: 882d08067bec2e88ab4db7a558eb4ae628ea49269443f81df25bd5d4c506c7c1
font_02_sfnt_off000131c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C9 16516 bytes
SHA-256: 35770cd7b779c1e206c13eeab9b0527e0773ac8216c7b3ef00fdb2574061c0ce

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