Malicious PDF — malware analysis report

Static analysis result for SHA-256 859bc3ac941c836a…

MALICIOUS

PDF

335.1 KB Created: 2021-03-09 06:01:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ff8b4b69ce081c6c6d04b6ff21696bf3 SHA-1: 5fb5443353a6964479fd4af856d6877629ccf631 SHA-256: 859bc3ac941c836a6792ecd6d1cdf63dbd4dc623c1e53597eb3fb1f1c79c94a3
104 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 heuristics indicating the presence of external URIs and urgency lures. The embedded URL `https://lozipotod.ru/award?keyword=treatment+of+mdr+tb+pdf` suggests a phishing attempt or a lure to download a second-stage payload. Although no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions, hence T1059.007 is included.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lozipotod.ru/award?keyword=treatment+of+mdr+tb+pdf PDF link annotation
    • https://cdn.sqhk.co/togodawexu/cqGgdhh/wonividadufazotol.pdfIn PDF document text
    • http://allroadkamchatka.ru/how_much_is_an_african_wild_dog94fiu.pdfIn PDF document text
    • http://giveaway2020.info/71768808380k5kvx.pdfIn PDF document text
    • http://paximosikelos.22web.org/bassinet_fitted_sheet_adairs.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/83777044444.pdfIn PDF document text
    • http://esclub.pro/weed_farmer_game_onlinetf2uv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_604668450298e.pdfIn PDF document text
    • http://dubejug.iblogger.org/does_in_a_sentence_for_kindergarten.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/libro_cien_aos_de_soledad_de_que_trata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_6020b5412ab36.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/Ygcugey/aimpoint_micro_t-_2_red_dot.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/31412796425.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/eQ5jeWP/25646359352.pdfIn PDF document text
    • https://cdn.sqhk.co/jabezoxujo/huwVIjc/kisewinovifopubokewusun.pdfIn PDF document text
    • http://raisinshq.club/how_high_do_i_hang_my_bat_houseeimqq.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/supulolevopiledu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tafogusegabomu/texukepajegepeves.pdfIn PDF document text
    • http://xujogefup.rf.gd/princess_diaries_2_full_movie_dailymotion.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/17368868873.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/fraction_multiplication_worksheet_3.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/titisidujetopekugobina.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/46335468229.pdfIn PDF document text
    • http://lurilufe.epizy.com/sound_recorder_app.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/90639625376.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004d2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2C9 5064 bytes
SHA-256: 01c7626e0e35a26d32f197964ef9e15a287d096ab8b1ada3e09f3067f04e9768
font_01_sfnt_off0004e3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3E4 16804 bytes
SHA-256: 78f7b0ba756acfad3ef211e83d71d34abd41a9d4601f39fd85fa1c3282035412
font_02_sfnt_off0005182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5182E 16148 bytes
SHA-256: ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0

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