Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0837d207dec1cc…

MALICIOUS

PDF

82.6 KB Created: 2021-03-23 15:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a00c4a3c4ced6d1f15b37e18a9b65a59 SHA-1: b37da14963ec60e9acff3d79a20de722fdd3654a SHA-256: 7b0837d207dec1ccbcf8d651041f526b70afa68416339b02ffc45ba777dda407
134 Risk Score

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=sample+blotter+report+pdf PDF link annotation
    • https://cdn.sqhk.co/ragejeli/hfG6ZFt/fegipunoneregibolaw.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/oxford_picture_dictionary_second_edition_english_russian.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_60493f57c7cca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417534/normal_604a684b58447.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417423/normal_5ffa2af5a9722.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/biodiesel_disadvantages.pdfIn PDF document text
    • https://cdn.sqhk.co/kixikeli/ngdvQ7k/xudazuwesirerasijiguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_603def2076f59.pdfIn PDF document text
    • https://cdn.sqhk.co/palezubifo/gdyifuU/61811298251.pdfIn PDF document text
    • http://pirewarekow.mywebcommunity.org/roman_numerals_1-100_copy_paste.pdfIn PDF document text
    • http://zokupez.mygamesonline.org/network_security_books.pdfIn PDF document text
    • https://cdn.sqhk.co/guwiwugomo/ijjihha/the_intouchables_imdb_parents_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_a2e0e336afc44a8db41b734e473bddff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/51479642587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c8dc28-97b0-4757-acd1-2709f6065e8b/shoot_em_up_full_movie_2007_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/becoming_a_better_you.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791557ed-5c14-4084-995b-d45c0deb489b/biden.pdfIn PDF document text
    • https://d5f1d3db-1598-48d0-a061-764c190a6564.filesusr.com/ugd/866690_0e67f42edc8749898ac3e435efc858ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/honkai_impact_3_herrscher_of_reason_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157cd922-2790-40ab-bae8-5d375f211827/is_a_4_qt_crock_pot_big_enough.pdfIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_06015024c5744024b850aa5d0a218a50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jupoti/chammach_chammach_song.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/zaxujararokigotet.pdfIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_251696c7ddfb464b99ce30f844fc7612.pdf?index=trueIn PDF document text
    • http://vexolofifete.atwebpages.com/bepekowogizinijuvodelinoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/169ffe3d-cf37-4658-9bce-3c4a3f51cce1/rujijujunomabexariguna.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_off0001030a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030A 5252 bytes
SHA-256: 29e2bea92dc857f463d9cfa965b05373642e21ceabcbffef95a706975ac14f4b
font_01_sfnt_off000114c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C7 11612 bytes
SHA-256: 962854b15226b4382410f6988b18f2453e30964fe0475c80716ab651ae90b9df