Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37189b396219b16…

MALICIOUS

PDF

137.3 KB Created: 2021-02-21 15:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 000352e50573ced58fb5ac8095708e51 SHA-1: 3b80ee5e325e754b8ab4642171a3b57355fcb679 SHA-256: d37189b396219b16b5521a79dc17a895fc58c57231be7949dd84198b5266ae1c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/strik?utm_term=what+is+the+meaning+of+kubla+khan PDF link annotation
    • https://cdn.sqhk.co/luwagoma/BVmgjYG/lubelasukavudomijalefe.pdfIn PDF document text
    • http://hot-money.fun/gemuzikuwinobaradogfqdqc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_5ffa54592a776.pdfIn PDF document text
    • https://cdn.sqhk.co/tetaxekumipi/yXjfhgR/residual_calculator_lease.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374364/normal_5fcd9b2d3f3da.pdfIn PDF document text
    • http://cabinetsop.xyz/74315493391p5uwp.pdfIn PDF document text
    • http://interbankdigital.com/imagenes_de_cerebros_para_colorearplxec.pdfIn PDF document text
    • http://fruittea.space/54731829882b91qz.pdfIn PDF document text
    • http://fruittea.space/preparazione_al_celi_3_b2_livello_intermedio25n96.pdfIn PDF document text
    • http://ashotik.space/minn_kota_ulterra_remote_operation1j1q8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5ff7f025458dd.pdfIn PDF document text
    • http://uniques.space/broccoli_sprouts_nutritional_informationces55.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/gnjbana/40639967782.pdfIn PDF document text
    • http://bettermoneytips.com/musculoskeletal_examination_vivek_pandey0rkhm.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/gjjVmge/6795871094.pdfIn PDF document text
    • http://soldonlittleton.com/year_8_math_worksheets_with_answers03uwp.pdfIn PDF document text
    • http://6gusevshop.website/what_is_a_voided_check_wells_fargon3ybw.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/fenatagazise/central_abuse_hotline_record_search_form_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/bedezof.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/canon_rebel_t5i_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/love_animation_video_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/13134192229.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001df99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF99 5300 bytes
SHA-256: ca95abaabe6869e5c5b27a060f6484479aba44de9bbb53de1f3d5ff30db7a5b2
font_01_sfnt_off0001f194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F194 11016 bytes
SHA-256: 30420036de7cebce55aa69ac6441ea6317105671cc5f32415ae37f8590527010

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