Malicious PDF — malware analysis report

Static analysis result for SHA-256 034e82a2200c72fc…

MALICIOUS

PDF

71.5 KB Created: 2021-03-29 01:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: fe1dfcd5995bf1c0c9f2169e72789fd4 SHA-1: 58de3b0591580d98a1bbe3fdf89144ae4371054a SHA-256: 034e82a2200c72fc99a2f43364285736679ca983970835eacc26e1be5a0a6b8a
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it is a link farm, with numerous external links, one of which is identified as malicious. The document body, though heavily obfuscated, contains text suggesting a lure related to 'crossword answers'. The presence of external URIs and the ML classifier's high confidence score strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://botokaw.ru/123?utm_term=repaso+del+capitulo+4a+crossword+answers PDF link annotation
    • https://cdn.sqhk.co/tokebamojos/gigeWVw/hitman_sniper_pc_game_highly_compressed.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuvajebodu/ibjdoVs/parentvue_lcps_nm.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/yW52phc/call_recorder_free_for_android_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/bWH1heJ/mesaminajivinevovutopuwe.pdfIn PDF document text
    • https://cdn.sqhk.co/foradimotiri/hdicvje/susobinekitobupomur.pdfIn PDF document text
    • https://cdn.sqhk.co/xejexeremiso/rjgpja7/paycell_kart_aktivasyon_nas_l_yap_l_r.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/MjfidVc/mi_x_launcher_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_836f867fbf1a420989c31bc235564c25.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/platform._select_react_native.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/context_clues_worksheets_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/walgreens_home_blood_pressure_monitor_reviews.pdfIn PDF document text
    • https://7fc1e5b2-1dd8-4457-9de2-3dea1ab9f589.filesusr.com/ugd/fedd61_d2b9c51661a84224a552c9067fe617e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefadep/apc_full_form_in_police_department.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/chamma_chamma_old_version_song.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/35837287804.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/how_to_change_deck_belt_on_husqvarna_riding_mower.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/rumodiwosinozej.pdfIn PDF document text
    • https://a22c3535-4c29-4f26-bf6b-1e631d3648e5.filesusr.com/ugd/28986c_2bc20ccfe3704bbb9864f4a057cee2f8.pdf?index=trueIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_5bf52450f6014e0eb11c68f3e70fa8d6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/eclipse_java_for_mac_os_x.pdfIn PDF document text
    • https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_b27d3b1059a2475f8d48a0a245196efe.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_b148cdfc65f64566afdff9a6b8371f6b.pdf?index=trueIn 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_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 5252 bytes
SHA-256: 439ee6ed54a34ca566919896d727c5f86b34772c512ce5e4446329d01c19e3e3
font_01_sfnt_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 10372 bytes
SHA-256: b47d6a459cac090d6fea378b176c6c1b6369b306a16ee1e399b87b0b1949fb59

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