Malicious PDF — malware analysis report

Static analysis result for SHA-256 02aae4f99d9cbad1…

MALICIOUS

PDF

75.5 KB Created: 2021-05-03 20:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c84e599998be20170dfbb9e5dde3f96a SHA-1: 89d35de0e5685cd0581d324138285b2ff97eb820 SHA-256: 02aae4f99d9cbad1089a7b77fc064aa3f8e067692bab90a5368c94000d5682bc
126 Risk Score

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 0.9960

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://pelibifir.ru/strik?utm_term=how+to+turn+parrot+bluetooth+on PDF link annotation
    • http://pikejofopon.mypressonline.com/annihilation_full.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_5fd79ecc8bb13.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/jdQibjg/extra_long_press_on_nails_coffin.pdfIn PDF document text
    • https://cdn.sqhk.co/fewoxenovof/g6IZFgg/tekatilakasakaselofegup.pdfIn PDF document text
    • http://xokebidukefu.getenjoyment.net/xubitukevubusinem.pdfIn PDF document text
    • http://kevekozulanilim.sportsontheweb.net/yahtzee_score_sheets_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377647/normal_60055fc483505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_60267a652e753.pdfIn PDF document text
    • https://cdn.sqhk.co/jagibuvat/id0uhdK/top_digital_marketing_companies_in_kerala.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489615/normal_5fe30b76765cd.pdfIn PDF document text
    • http://pijebum.iblogger.org/xudikezunezisar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_60216d9460c0d.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/iNgjFDa/milk_chocolate_frosting_recipe_for_cake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480755/normal_600bfd8635a06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409239/normal_6064ad643eb85.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tadiwolavis.epizy.com/center_text_r_markdown.pdfIn PDF document text
    • http://viwofobowitol.epizy.com/types_of_plain_carbon_steel.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_96675aeec90547d296bbddf2ffc9ad5a.pdf?index=trueIn PDF document text
    • http://nulabede.epizy.com/de_broglie_equation_worksheet.pdfIn PDF document text
    • http://tudozujuxijoz.rf.gd/gisowuwegakikipare.pdfIn PDF document text
    • http://larovitivejel.atwebpages.com/15786364478.pdfIn PDF document text
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_2ecdb1047b9c46539e0b4c21d68dd09a.pdf?index=trueIn PDF document text
    • https://314f4944-3dd9-45af-b5ee-fc7f46c963e4.filesusr.com/ugd/73cb9e_2587af74dd864b4d805e530810a8eeed.pdf?index=trueIn PDF document text
    • http://xufolat.atwebpages.com/explain_the_generally_accepted_accounting_principles_with_examples.pdfIn PDF document text
    • https://1b65b899-5fad-42bd-af9e-a3fb1d6a4c80.filesusr.com/ugd/a2ebd8_9bfe81b1113c4878ba270caf2526d178.pdf?index=trueIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_e43a2e0a3ceb43558ec01d57b5e89217.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 4920 bytes
SHA-256: ef11b8b5787f37a6ef06a20dea07050212c5525e8c53bb69945bf9d4d8926f4b
font_01_sfnt_off0000fa3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3F 11256 bytes
SHA-256: 17d8d8984f9d507ad1ec6c6aa6e062b5f7e78cb649aa78d2a751f531a2eca458