Malicious PDF — malware analysis report

Static analysis result for SHA-256 4211bb23ffbb0835…

MALICIOUS

PDF

88.5 KB Created: 2021-03-18 14:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c440f5c5d57d0cdd0485a22bd59cfb77 SHA-1: baee3a92f981fb164cb5738e45313aed2835b783 SHA-256: 4211bb23ffbb083557aae9c2aae0149595edf2b3ec378de31c9574f16fd23ca4
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains embedded URLs, one of which, 'https://jumiwimov.ru/aws?utm_term=how+to+manage+conflict+at+work+pdf', is presented in the document body as a lure. The presence of embedded URLs and the nature of the detection suggest this PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/aws?utm_term=how+to+manage+conflict+at+work+pdf
    • http://nemurirewokow.iblogger.org/guidelines_on_food_fortification_with_micronutrients.pdf
    • http://xofawewojego.22web.org/2012_toyota_highlander_hybrid_battery.pdf
    • https://xorizetevapaze.weebly.com/uploads/1/3/1/4/131438163/26fba16a9ef.pdf
    • http://zozemumole.iblogger.org/aaru_song_mass_tamilan.pdf
    • https://nivebisela.weebly.com/uploads/1/3/3/9/133997547/zipukinilafizaj.pdf
    • https://bokefelefu.weebly.com/uploads/1/3/1/3/131383825/zitoxuf-zunav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/9d6c1471-5151-4440-aeda-396b99c127ba/a_midsummer_nights_dream_modern_text.pdf
    • https://uploads.strikinglycdn.com/files/55969994-97ea-465d-9185-b4de6d6e41cd/59720713290.pdf
    • https://uploads.strikinglycdn.com/files/bbbe83e1-1174-46a6-ae88-58e33933ce4a/online_masters_degree_coaching_psychology.pdf
    • https://s3.amazonaws.com/kofabube/73619220158.pdf
    • https://uploads.strikinglycdn.com/files/686c0065-031c-4441-8c25-e08418c656a6/varuferumiwutunoreboselin.pdf
    • https://uploads.strikinglycdn.com/files/3224aad1-b700-43ea-946d-6479e6a68664/junie_b_jones_and_the_stupid_smelly_bus_plot_summary.pdf
    • http://lenuduxefo.epizy.com/81355635725.pdf
    • http://nelipofamarul.epizy.com/dimivaruboxudumitekiwi.pdf
    • http://wenaxanovaniz.rf.gd/pevoxekopoxevikale.pdf
    • https://s3.amazonaws.com/foneniz/choosing_wisely_guidelines_breast_cancer.pdf
    • https://s3.amazonaws.com/votubukaxogilix/hajj_and_umrah_guide.pdf
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_842c11c124e64807a937eff435b7c733.pdf?index=true
    • https://s3.amazonaws.com/dudujopixejikug/christmas_koila_telugu_songs.pdf
    • https://s3.amazonaws.com/zonivezada/kefoxatafopatad.pdf
    • http://lepugip.epizy.com/jolixogutu.pdf
    • http://kidereludabiron.epizy.com/nunizuseviw.pdf
    • http://ronodinagidos.rf.gd/2397700396.pdf
    • https://cf2e1f24-e5f1-4289-9567-3affce9c164e.filesusr.com/ugd/a4ea6c_8cecf0bf0cb140e68f3a9b781b5f4650.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e2f.bin
18b6d1e42028b1cf0029ccef1630a1636e1de86662b45e0533231488eba66f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2F 5200 bytes
font_01_sfnt_off00011fcf.bin
cd495e66a09671355d13d41bcf75c40be62c777a1876b76a91b9e32136e671fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCF 11144 bytes
font_02_sfnt_off000145e3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x145E3 4324 bytes

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