Malicious PDF — malware analysis report

Static analysis result for SHA-256 02176d9042c61a61…

MALICIOUS

PDF

114.5 KB Created: 2021-03-16 00:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: edb006ea05ef4bb658e814cfc95a6272 SHA-1: 320083de5d37a1f2c70ce7657a781985e02c08c8 SHA-256: 02176d9042c61a610087450d93819151b2ad62aab05281c9ece3c62ebd85b170
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=askep+kasus+bronkopneumonia+pdf PDF link annotation
    • https://cdn.sqhk.co/xewasejeve/jcj49hf/audio_aula_de_ingles_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/i6EjjM6/zutori.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/c217dcebd.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/jeJdjij/happy_meal_app_apk.pdfIn PDF document text
    • https://tisemadu.weebly.com/uploads/1/3/4/3/134387657/9152023.pdfIn PDF document text
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/porawopaguva.pdfIn PDF document text
    • https://cdn.sqhk.co/gelowidabik/tDhjjjd/zedetuliluzubedoruxekapir.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/ShgDih0/cross_stitch_christmas_cards_free_patterns.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/cpFK6hi/photo_lyrics_video_maker_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/momugutatok/ihfrogj/first_birthday_decoration_ideas_for_boy_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/juxezijafoz/ighfiB0/instant_website_builder_with_store_websites._co._in.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/aAC4qTD/20647506248.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/ijgejbW/11391809862.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/ddiiihM/minecraft_speedrun_world_record_2020_random_seed.pdfIn PDF document text
    • https://ligiponofejejo.weebly.com/uploads/1/3/4/3/134346234/rolubef_galasavutuwa_romomozoje_gepipabupofuroj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4db3e693-311e-4394-9909-2d941edb86cf/how_to_draw_yugioh_blue_eyes_white_dragon_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d70e9b-8e27-4a40-b213-a213e79ef73c/asm_handbook_vol_18.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55884585-4074-4dab-86bc-cb46d69e4fe9/xosonefawarerofakak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a88cc2-1513-4f53-942c-c94bbb058ab7/92807231202.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9eb47b-4d0e-4d17-88c0-82758ccf4b91/75608923835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec8ad2cd-4e5d-4908-ba33-bbedcda81d50/20528763927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61694679-f979-49db-bfdc-999f3f771a89/dr_brown_bottle_warmer_and_sterilizer_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c400965-168b-4369-96f6-e30683fe365c/54958977687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9469fdfd-ca55-4d2d-a176-41381b610ef7/built_to_sell_download.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_off00018569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18569 5348 bytes
SHA-256: 6ce94de89b979ea6b31b7248c367a0efbce202724fb5f6bf913841089af1bad2
font_01_sfnt_off0001977f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1977F 10668 bytes
SHA-256: 610e72ffd57a2a91af1c25bf67683b3869ef2683d9ebe0d4b2f74d59b06a0ca9