Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0af2cf08da126d…

MALICIOUS

PDF

77.5 KB Created: 2021-02-16 06:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 482e0073ba0b9b4d0556cb10527b3f9f SHA-1: 762e0f32821f257969bc555144b1af1240f8e9ea SHA-256: df0af2cf08da126d4fd754db38aa3660e8e9a669a1ad293373caf12f67424102
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on dynamic DNS services or free hosting platforms, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the document's primary purpose is to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=procreate+tutorial+portrait PDF link annotation
    • https://petizigosi.weebly.com/uploads/1/3/4/9/134903326/lezogedorajuv_vuxota_lamulasusitoti_jiperazut.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/994630.pdfIn PDF document text
    • http://zokumujanuni.iblogger.org/yousufguda_weather_report.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/idgfL1z/14024215522.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/gh6hdha/emojistan_emoticons_for_texting_emoji_for_chatbots.pdfIn PDF document text
    • http://dirugalaw.22web.org/77863176715.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fasipubaweguguf.rf.gd/27563716155.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/how_to_make_photo_emulsion_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/76540935252.pdfIn PDF document text
    • http://wedizakur.epizy.com/pozeku.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/gamit_ng_malaking_titik_worksheet.pdfIn PDF document text
    • http://dexifuv.epizy.com/apsu_rewa_admit_card_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/jigsaw_puzzle_game_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/hydrolysis_of_salts_lab_report.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_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 4748 bytes
SHA-256: 7b6b59d354cacf5a30ccd63bc8c1f2ff9489b04cb23405cdc9f228b7a1f6de09
font_01_sfnt_off000106f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F9 10004 bytes
SHA-256: 5e42e4e3a2718ff799bc9015083434baf494dc657166356b6f351d1bde30efab

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