Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead50895fd165cfc…

MALICIOUS

PDF

77.8 KB Created: 2021-03-19 17:55:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61d7b7fb261188e18c4d9a2951ee002f SHA-1: e6a0b1ff88d7dd9260f467e4c4a41bf204f23014 SHA-256: ead50895fd165cfc9c366c37ed410a88137f4374b2bb04f516c54d80a0e2009d
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, suggesting it's designed to redirect users to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to educational worksheets, which is a common tactic for phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=adding+fractions+and+decimals+worksheets
    • https://static.s123-cdn-static.com/uploads/4477629/normal_5fffca23d52bd.pdf
    • https://zidadosivifaju.weebly.com/uploads/1/3/0/7/130775619/52035340b9b.pdf
    • http://vabapagamowese.22web.org/how_to_perform_istikhara_step_by_step_in_hindi.pdf
    • https://xuwuperozaposa.weebly.com/uploads/1/3/2/3/132303395/gijewopugibapo.pdf
    • http://zugawumaz.22web.org/sojazoxule.pdf
    • https://poximixej.weebly.com/uploads/1/3/0/7/130776069/4029702.pdf
    • https://cdn-cms.f-static.net/uploads/4486060/normal_60148f3540db0.pdf
    • https://cdn-cms.f-static.net/uploads/4378171/normal_6033495b6912e.pdf
    • https://cdn-cms.f-static.net/uploads/4480895/normal_60520c07a82d1.pdf
    • https://subijiderekura.weebly.com/uploads/1/3/4/6/134616270/zujafaker_bitenub_kezatumepoj.pdf
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/mupekas.pdf
    • https://ruwuzeget.weebly.com/uploads/1/3/4/7/134755445/nisizurisagokix.pdf
    • http://jokidinavefo.22web.org/1_dimensional_motion_physics_worksheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://numadipabep.epizy.com/words_bee_gees_piano_sheet_music.pdf
    • https://s3.amazonaws.com/gumagabu/20870590207.pdf
    • https://s3.amazonaws.com/zuguvoxoki/revosojubet.pdf
    • https://s3.amazonaws.com/gazivemon/cambridge_dictionary_app_for_pc_free.pdf
    • https://s3.amazonaws.com/toliwudalamem/will_there_be_a_sequel_to_a_house_with_a_clock_in_its_walls.pdf
    • http://nalakakowim.epizy.com/mafatisamotatiresulabokaw.pdf
    • http://faxunarin.epizy.com/gutobadomazanekuzo.pdf
    • http://varumupoz.epizy.com/tepatusuvivusopopote.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1a1.bin
45d4f8cbc756ee9797963fc1558de20d60af33ab97516f702cfa2bc62d887057
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 5580 bytes
font_01_sfnt_off00010487.bin
9b071862812560d26393843b255488304180aa4548893a7f37c7307e7dbd661d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 10720 bytes