Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb1d0fcfced2109…

MALICIOUS

PDF

105.5 KB Created: 2020-12-01 10:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 099c88dd9d7c7aa527ce6d1840c4e625 SHA-1: 2c270a8cee61dd8a25705b0cb7e57f50e66a51a2 SHA-256: aeb1d0fcfced2109ec4487708dac65c859fc5e1ab5e4232e7c07408f993ee89c
214 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffmen.ru/strik?utm_term=trace+fossil+definition+scientific In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5fbf1158c895d.pdfIn PDF document text
    • https://gekilatati.weebly.com/uploads/1/3/4/3/134378061/botowero.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420430/normal_5f9b317863a9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc4d9cdc14dfd36fe0adb20/t/5fc512ab4f983757207fba91/1606750891630/city_of_havelock_water_application.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4992cb3e0f577145965b/1606371732902/how_to_cook_quail_eggs_sunny_side_up.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd060673299f0c543b09c7/1606223367020/41159008676.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/exclusive_arctic_wolf_plushie_animal_jam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06ad1491241adc46f397/1606223535121/12933384746.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf491d4e98326c02068c62/1606371613760/tu_poeta_pista.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd361399037f6de3fee805/1606235667888/bonide_systemic_insect_control_granules.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4cd31972c46e3c9512e6/1606372564708/sawojalakigunoleguruv.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/sinujanudusa.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27eb48ef7301f8b1ae02f/t/5fc3d1be4f9837572054cd93/1606668734806/19069967109.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/85093271645.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD6 4752 bytes
SHA-256: 1365c853c1d85b5e72b3340a118084d786c41c8e125b8430ede07496e1aa5a20
font_01_sfnt_off00014cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CF7 12156 bytes
SHA-256: 0b76b30123b6d348a4c30214d4951b5eef00f2a3e542c795701a5b4b09194d34
font_02_sfnt_off0001753a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1753A 16164 bytes
SHA-256: e428de66ceb9deebdb53ebe71febfe16dde38f113f03500bd416f391f33c23f3
font_03_sfnt_off00018a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A59 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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