Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d381fca0d3ec5f5…

MALICIOUS

PDF

105.9 KB Created: 2021-02-18 06:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e189418a58643c4eed8643657e41cead SHA-1: 38e4d3c28c1114732b3ff83ed0d72d39a9777d05 SHA-256: 4d381fca0d3ec5f5ff227e16dd4ef2d0f64295bac7a6013f683e7c625644503b
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link farm pointing to external PDFs. One prominent URL, 'https://baarspo.ru/wix?keyword=plants+vs+zombies+free+full+version+unblocked', suggests a lure related to popular software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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://baarspo.ru/wix?keyword=plants+vs+zombies+free+full+version+unblocked PDF link annotation
    • https://cdn.sqhk.co/gefeloxo/jechija/mobizen_screen_recorder_free_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/aAnciau/stiletto_shoe_cupcake_maker_game_diy_cooking_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/xigofidiw/gjjhAja/download_apk_storybeat_no_watermark.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/g3giiiR/download_game_puzzle_hero_full_version_free.pdfIn PDF document text
    • https://dibekojiworibo.weebly.com/uploads/1/3/1/6/131637919/xoberekuf_kafagupuvefo_kadogujoro.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/butumebe.pdfIn PDF document text
    • https://daxodewime.weebly.com/uploads/1/3/1/3/131398188/9524300.pdfIn PDF document text
    • http://www.typoland.com/http://www.typoland.com/designers/Lukasz_Dziedzic/CopyrightIn PDF document text
    • http://www.typoland.com/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://kokomato.epizy.com/76245815572.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/canon_80d_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/49865797302.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/blockchain_revolution_don_tapscott_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jemazejodep/acknowledgement_of_paternity_form_vs22_virginia.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/php_for_the_web_fifth_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/povanesigawejikiw.pdfIn PDF document text
    • http://dogurof.epizy.com/69371085992.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/sexonazaxower.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001007b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007B 14084 bytes
SHA-256: c7b227aa2f524406b544a0bebdff5fb90aca88d95b076a98241e2393d8a0480b
font_01_sfnt_off00012de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE9 6168 bytes
SHA-256: d841e6ee9fc5f8d88f1d94419f2a0f587508a927e8deb92e2b18ca34c352e48a
font_02_sfnt_off00013d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D88 5484 bytes
SHA-256: fb1050b45a9a39247104116d3c44329a638f77668e1dabd2d55a2e107242e590
font_03_sfnt_off00015026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15026 3672 bytes
SHA-256: 94310b415bc4e96a848d8a275b3af6d2d0f13be8c94ab0886ad366e3854fa4dc
font_04_sfnt_off00015b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B35 11336 bytes
SHA-256: 55ffdfd00561a866498c0077bfd9a441d7c92c9c647adb96d32f4ab482a11687
font_05_sfnt_off00018225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18225 16360 bytes
SHA-256: 216585098dfdf2bba538fb5bf50c46d9237d26c8664097baa76e53018f5ade94

Open this report in the interactive analyzer, or submit your own file for analysis.