Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0aa1fc1107defc…

MALICIOUS

PDF

64.5 KB Created: 2021-01-17 12:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 90e7a76a3bfc2b7a3d9809945a928158 SHA-1: 787d2475f31df7f70adad1372a316c2a9bd11bad SHA-256: ee0aa1fc1107defc1f4bb0e4f6fe5f65ea1e04326fc86a5a727a079ebe6be38a
184 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs pointing to disposable domains, suggesting a link farm or redirection scheme. The primary purpose appears to be to lure users to potentially malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://gettraff.ru/123?utm_term=no+man%2527s+land+beef+jerky+jobs In PDF document text
    • https://xisidugaboker.weebly.com/uploads/1/3/4/4/134436298/mefuromowolonufifo.pdfIn PDF document text
    • https://kogevinipuban.weebly.com/uploads/1/3/4/5/134514077/5023189.pdfIn PDF document text
    • https://site-1175777.mozfiles.com/files/1175777/50530076916.pdfIn PDF document text
    • https://site-1177382.mozfiles.com/files/1177382/crafting_and_building_free.pdfIn PDF document text
    • https://site-1218501.mozfiles.com/files/1218501/my_talking_angela_new_update_2019.pdfIn PDF document text
    • https://site-1173855.mozfiles.com/files/1173855/19060550292.pdfIn PDF document text
    • https://site-1175129.mozfiles.com/files/1175129/2048_3d_plus_no_ads.pdfIn PDF document text
    • https://site-1177757.mozfiles.com/files/1177757/cape_bordeaux_red_blend_report_2018.pdfIn PDF document text
    • https://pibemalogodozod.weebly.com/uploads/1/3/2/6/132681910/ziguramumuzixutesesi.pdfIn PDF document text
    • https://site-1177746.mozfiles.com/files/1177746/49979037620.pdfIn PDF document text
    • https://site-1177097.mozfiles.com/files/1177097/tubux.pdfIn PDF document text
    • https://xisaluzesa.weebly.com/uploads/1/3/4/6/134602292/jonowik.pdfIn PDF document text
    • https://site-1166739.mozfiles.com/files/1166739/modern_tools_mod_1__12_2.pdfIn PDF document text
    • https://site-1180490.mozfiles.com/files/1180490/kitchen_food_chopper_dicer_slicer.pdfIn PDF document text
    • https://janikopet.weebly.com/uploads/1/3/4/6/134690806/7135298.pdfIn PDF document text
    • https://site-1166600.mozfiles.com/files/1166600/hp_brocade_6505_firmware.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000bf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF9B 5440 bytes
SHA-256: 3f351f9392f591a233966d8896dcaedadb1186ce60fdb598eaf236193e9477a5
font_01_sfnt_off0000d217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD217 10196 bytes
SHA-256: d597b21d1709fc35ce728b241684b59ba95b96ccd608976921009abdb1e33054

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