Malicious PDF — malware analysis report

Static analysis result for SHA-256 888b271caf4aa364…

MALICIOUS

PDF

102.4 KB Created: 2021-03-19 14:47:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8ef5c35de5cc27f0cfb88cfc5f91d567 SHA-1: 2c64c2bd1cc1432a053efc1928c92e657dfc73c7 SHA-256: 888b271caf4aa364bdb18b01fc1f223986ed78173e4058a6bf824e45a6d67b44
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains metadata suggesting it is masquerading as a historical document. The primary malicious indicator is the embedded URL pointing to a suspicious domain, likely used to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://druttle.ru/strik?utm_term=palo+mayombe+history PDF link annotation
    • http://fumuponi.22web.org/kagabumudovogelibes.pdfIn PDF document text
    • http://xekumaluvox.iblogger.org/56014624980.pdfIn PDF document text
    • http://damvglaz1.xyz/368408513375b3yy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_602e330684715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469841/normal_601727935fa87.pdfIn PDF document text
    • http://geforiro.scienceontheweb.net/logiciel_gratuit_pour_convertir_en_word_candy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_603182fabc4ab.pdfIn PDF document text
    • http://mon-fortuneo.best/22770251747y932b.pdfIn PDF document text
    • http://obschee.xyz/princess_leia_s_theme_piano_sheet_music5wy4a.pdfIn PDF document text
    • http://zisapawiwako.mypressonline.com/how_to_charge_cisco_flip_video.pdfIn PDF document text
    • http://glawerry.online/174719890259pq76.pdfIn PDF document text
    • http://differencecheats.net/17005389723idx51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5fd79792c26ef.pdfIn PDF document text
    • http://nobukuxokosiga.mypressonline.com/92480782517.pdfIn PDF document text
    • http://jeseselanus.scienceontheweb.net/educational_management_information_system.pdfIn PDF document text
    • http://zakoroxani.22web.org/pool_table_games_free_for_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sezewu/pisorugedonor.pdfIn PDF document text
    • http://tuminexozuvino.atwebpages.com/matlab_multivariate_normal_distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/sibotewuxedusaxagedube.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/phd_thesis_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/football_live_stream_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/manual_bmw_x3_2016_espaol.pdfIn PDF document text
    • http://jalasofumikom.rf.gd/awadhi_cuisine_book.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/arrayadapter_in_android_kotlin.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/section_17_of_cgst_act_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/94702970886.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14730 4848 bytes
SHA-256: 845407d00a198170ec4a3a68912ffce2c049390875c20273d4864a748283aa3d
font_01_sfnt_off000157ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157AE 11700 bytes
SHA-256: 1ad06fa77422df74c5a13563849a57930c8c137cbd31910d40f141996eb4885c
font_02_sfnt_off00017da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DA4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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