Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9a80eb6bb2936f…

MALICIOUS

PDF

77.6 KB Created: 2021-03-16 14:31:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 47a0131fef6c983ea9d1d9f5dd5e25a3 SHA-1: 24e88a177c086ab461f9f0430e72c08a0a07cf45 SHA-256: 4b9a80eb6bb2936fc373b9a8a46c635bed198aa864370adb47e84fd8ad7e4476
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to search results, attempting to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/strik?utm_term=washington+dc+museums+open+on+saturday PDF link annotation
    • http://weinmvc.net/zodotifufuwolifatajosekesc7xfe.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/nazivokuvonokored.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_6020d3f11eadc.pdfIn PDF document text
    • http://gibipimaxadebip.iblogger.org/linear_algebra_friedberg_5th_edition_solutions.pdfIn PDF document text
    • https://rerutafedebe.weebly.com/uploads/1/3/2/8/132815298/vagoraxo_jurepolu_xifug_gulosivubom.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/farewell_my_lovely_film.pdfIn PDF document text
    • http://jepenufi.getenjoyment.net/37852033879.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_600831e01cc2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474448/normal_5feba2e0dc481.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5fcf11e29b938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5fd669ad0a98b.pdfIn PDF document text
    • https://nizifaweneli.weebly.com/uploads/1/3/4/5/134589853/dofupo-nipukezit-satuvulufubifaw-jodizijik.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/how_to_set_up_my_ooma_telob8zt3.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/mathematical_physics_by_arfken_and_weber_download.pdfIn PDF document text
    • http://123dutch.com/verbos_regulares_en_ingles_conjugadosb6284.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zeliganav.epizy.com/ryobi_backpack_blower_gas_oil_mix.pdfIn PDF document text
    • http://vedudide.rf.gd/8193341384.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_88b4b14a516b40d7b31aa9868360620f.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_b1c7cddf89f845c19eb8342d09554436.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_4170ce6cf1274772bc4e3587d8a391c7.pdf?index=trueIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_f0bbe8e4c3c64e218f4f27b4eff7a328.pdf?index=trueIn PDF document text
    • http://sagisat.rf.gd/ios_13_public_beta_1.pdfIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_6e2c775d0e7f48659bee3e069cc180f5.pdf?index=trueIn PDF document text
    • http://gakuxalodakedaj.epizy.com/what_does_maiden_trip_mean.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 5572 bytes
SHA-256: 0b8cfefa3a72c0f37dcf8c0489b181776aa4159ce8dd820527b9a7656230e7a3
font_01_sfnt_off0001042c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1042C 10776 bytes
SHA-256: 415533953ff1a9290dfdef828edbec93f98f3f0bc8f46e434a5f230cc98fdf3f