Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc42b5a33077e78…

MALICIOUS

PDF

75.1 KB Created: 2021-03-07 09:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 74326bd8acbefaaa929af788bc7c04a7 SHA-1: 00476be58187fa3360d8ef4c064c5c3fea620c89 SHA-256: dfc42b5a33077e78c65f193e5326e5a9cd355e8ee44817c6f1a496f09bf826b4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains text related to hunting, likely a pretext to disguise the malicious intent of directing users to potentially harmful websites.

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 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.
  • 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/strik?utm_term=how+to+shoot+deer+from+a+tree+stand PDF link annotation
    • http://miwasigal.mywebcommunity.org/vujuda.pdfIn PDF document text
    • http://slimitalia.space/2710917263g5t8c.pdfIn PDF document text
    • http://gnoogle.site/60857764000wrjz9.pdfIn PDF document text
    • http://true-board1.club/japanese_coches_hiaceywun7.pdfIn PDF document text
    • http://dobomepederu.22web.org/r_s_letter_whatsapp_status_video.pdfIn PDF document text
    • http://getbuiss.online/185964611460oqga.pdfIn PDF document text
    • http://alexsaf.ru/lekavojivinexadorudujsrpf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padepivezaw.rf.gd/public_relations_definition.pdfIn PDF document text
    • http://matogojetize.rf.gd/filmorago_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5dc5e93-f312-48c5-9e75-6cea78bfeb16/opening_a_file_in_paint.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/82311857864.pdfIn PDF document text
    • http://jegigas.epizy.com/manufacturer_part_number_in_sap_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/inventory_stock_count_template.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/febagotawaj.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/great_depression_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2e88cb4-358c-478a-b6c2-fe317db337af/bubble_sheet_for_9th_class_lahore_board.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/what_kind_of_oil_filter_does_a_3.0_mercruiser_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aaab1b8-f25c-4161-8762-7352e2955ad4/dorobusuvovezabipaselatov.pdfIn PDF document text
    • http://kipenul.epizy.com/tuck_everlasting_discussion_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/taranodurezopepug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6017fe8-94ec-45f6-b1e8-1e421af743b4/does_roku_work_with_echo_dot.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_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 5168 bytes
SHA-256: 3f1b65145bbd376d2abbc15ace13a128023b09a0d1065141fd19ef4b969901ea
font_01_sfnt_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 10192 bytes
SHA-256: a39d5f830394234ac9522005430ffe7f2e24e2fe030e21b5ed2b8f796eab64d5

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