Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b55d0e0030afa82…

MALICIOUS

PDF

77.2 KB Created: 2021-06-08 17:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 84ace042993e04340523d33ed9fa3b04 SHA-1: 98cd97b415cbe85af07f4c40ca9d6d1145db0813 SHA-256: 3b55d0e0030afa823e0fda9b6ad5879b09a71f4e3580400c8ce7ac577c6dab05
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://chcial.ru/pbw?utm_term=khiladi+bengali+movie+download+utorrent PDF link annotation
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/fisoxiputima_texefogapere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387814/normal_5fe02c8420f88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471512/normal_60606205d0bb6.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/90b3c1b3b.pdfIn PDF document text
    • https://segagewemavovus.weebly.com/uploads/1/3/0/8/130874565/3687259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405186/normal_5fee2580eb6ab.pdfIn PDF document text
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/wawavanati-widugewoxuzewa-xidasobojo.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/0a267d27-51c9-460c-a5f4-0736c506bf02/city_of_bones_tv_tie_in_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c6f9ae-9e36-42ae-bfef-5ca3698955a6/kofibanilojudimimutot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a803fd8a-b96e-463f-a6d0-981088f65411/tomorrow_when_the_war_began_2008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d488b9-f0ab-49d6-97d6-53ffbe1e4103/cant_wont_dont_stop_lyrics_drake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5cb3f2-183c-4276-9d3c-716745f24da4/dd-wrt_router_change_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6792ec48-71a4-4b87-b19f-8c8110531487/zebegokadutosedimidogesen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa40359-093d-4d2f-8b01-cb286132013a/xiwefup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe4ec43-cda6-4b9c-9070-feca14394917/dd_dyslexic_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c64f1700-d7c3-4b2b-9a21-b9ab7724cde8/what_god_am_i_a_child_of_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fceaf0e7-821d-49b8-8153-2db12c508c21/master_forge_jet_light_charcoal_grill_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7a6b26-ba75-4ea5-8047-6019c3f42046/city_car_driving_1.5_8_mod_installer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29ebf0b0-e0ca-4ec8-9357-43a7e2836dfa/kanodefuzenikisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db81f4d1-81d9-4675-bfaa-f4b9daaa2165/my_samsung_note_5_will_not_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c24fae-24b1-49ae-85ae-e3f65b016781/duzaxodipudepilipupurokiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb2d47cc-30ea-4f1e-b2fc-ee61306cc726/12341980210.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_off0000f0a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A4 5324 bytes
SHA-256: f3c0fc7fb1c62a87973e193659431785bf126bf4f26542a6c392c6b112a62545
font_01_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 10732 bytes
SHA-256: c85481f0b473257d58abae9eb675e5b7cc97db72ec50d5ec5235ebff57b4c320