Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e12e4a234627cfa…

MALICIOUS

PDF

82.3 KB Created: 2021-05-11 13:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 32f5d159447150e3bf372c3e85227ab9 SHA-1: 84aa872dbc81607601a496a3e247f7e71bd14f20 SHA-256: 3e12e4a234627cfa9b39b1401c2d673703c8249d0e282cf317f350ac09d6c298
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://crophysi.ru/strik?utm_term=how+would+you+describe+rhythm+in+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496153/normal_5fc5ee2f3d627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413235/normal_600bb869b5710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5ffea466b3a3e.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/ditej.pdfIn PDF document text
    • https://vovavurag.weebly.com/uploads/1/3/0/7/130739927/5dd62.pdfIn PDF document text
    • https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/050bc1161a8a69.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/igDidib/cut_fruit_recall_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/iBjRgdh/jumpy_jumpy_helix_ball_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/tz0Lrhe/befokoxelunimewekonedej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451574/normal_60074d45b3e6b.pdfIn PDF document text
    • https://bawimadesudife.weebly.com/uploads/1/3/4/3/134363746/9644035.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/the_5th_wave.pdfIn PDF document text
    • https://vojowejejetolor.weebly.com/uploads/1/3/0/7/130775680/risotiva-jotutenitani-vigamulibi.pdfIn PDF document text
    • https://cdn.sqhk.co/jovowosifo/sjijjfh/dragonsky_idle_merge_best_dragons.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/b8giVhj/nenudu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_6044747f36ef0.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://uploads.strikinglycdn.com/files/362d4150-5525-4e8a-bd48-b963a3242988/simple_weekly_timesheet_template_excel.pdfIn PDF document text
    • http://zotuxegusam.epizy.com/33563762783.pdfIn PDF document text
    • http://loserelosov.rf.gd/linux_administration_training.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/gethibernatetemplate_returns_null.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4bad89c-2be7-4bca-9bd1-044b253e19ee/craftsman_laser_trac_compound_miter_saw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/634039f8-e4a1-4a49-9438-57a557e0bb93/cabelas_meat_grinder_1hp_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39929831-9730-4019-96c5-bf4202781c6b/43199293704.pdfIn PDF document text
    • http://jufonerazulo.rf.gd/fundamental_accounting_principles_23rd_edition_download_free.pdfIn PDF document text
    • http://tudalumovadir.epizy.com/what_does_12b_mean_on_w2.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/fechas_importantes_de_las_reformas_borbonicas.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/atf_box_setup_11._90_free.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_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 5144 bytes
SHA-256: 17948df9d2b12adc4b0565c7f2525ba19e2270483cd4472795bef5a19cf83929
font_01_sfnt_off00010670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10670 10956 bytes
SHA-256: b35f36a53493876d89994a9da4999015e5dd52925cecf24c560120327b85b9d4
font_02_sfnt_off00012bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378