Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1053c8d22397944…

MALICIOUS

PDF

77.7 KB Created: 2021-03-22 05:13:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96fa4e101411b028c1fdf15844b1e772 SHA-1: a6f5e971b1ac110fecca664f3620d9b0ff4ddbc6 SHA-256: e1053c8d22397944906655ab09edbf4289c4af1ba63608dc2156ea1d1f40cecd
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, characteristic of a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate a strong intent to redirect users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/wix?keyword=david+wilkerson+the+vision+pdf
    • https://cdn.sqhk.co/temejikowewa/djijdfZ/22703352179.pdf
    • https://tipowunukal.weebly.com/uploads/1/3/4/3/134355136/c7fa0bedc09e.pdf
    • http://jeruxawi.iblogger.org/zolitezobifusatupezodi.pdf
    • https://xurepisex.weebly.com/uploads/1/3/4/7/134718841/6372535.pdf
    • https://cdn.sqhk.co/retirijozi/YjYjdMk/fender_acoustasonic_40_manual.pdf
    • https://cdn.sqhk.co/kelifevaz/oiigdjb/zarchiver_donate_apk_download_0._9_1.pdf
    • https://cdn.sqhk.co/rufopunuk/ybhfNgd/92532950060.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gevegure.rf.gd/dragon_coloring_pages_printable.pdf
    • https://s3.amazonaws.com/gekixadonuru/nuzigum.pdf
    • https://s3.amazonaws.com/xakajoziwibi/93166637567.pdf
    • https://uploads.strikinglycdn.com/files/8559f67e-98e0-4314-9a95-6e474c4af011/radukotumoxixebelavevogez.pdf
    • http://zoxarulal.rf.gd/13481599807.pdf
    • https://s3.amazonaws.com/boduxatavepe/sword_art_online_alicization_rising_steel_characters.pdf
    • http://wuxekijonudi.epizy.com/benzel_spine_surgery.pdf
    • https://uploads.strikinglycdn.com/files/f1115cde-3587-4299-9646-f2a40a69671a/21573142736.pdf
    • http://dewelimu.epizy.com/visual_basic_2010_format_date.pdf
    • https://uploads.strikinglycdn.com/files/3201bae4-822c-474e-90ca-87828eb047f1/how_do_you_charge_wireless_beats_without_a_charger.pdf
    • https://s3.amazonaws.com/nowokil/42732943610.pdf
    • https://s3.amazonaws.com/wovugi/challenging_yourself_at_the_clinic_worksheet_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27b.bin
154d9c13d045d75073bccff43122a04984d4e066148726f1019b52f5726c752e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 5344 bytes
font_01_sfnt_off000104c0.bin
316d1f3d954a62704a9b25811f990e05b4f84539cf1ac6af33a35f944e54d331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 10760 bytes

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