Malicious PDF — malware analysis report

Static analysis result for SHA-256 296f43f0a7afc167…

MALICIOUS

PDF

79.8 KB Created: 2021-02-26 02:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 1297229cbf81250b12d362962fe2c0b3 SHA-1: 119da1a0d98d9ed77f3204ed803567b57e4dd9b5 SHA-256: 296f43f0a7afc1676f841bda1eb75df1f45ccc98edd04819d8f2abad5951931c
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a high-confidence heuristic flagging it as a link farm. One of the primary external links, 'https://jottigo.ru/wix?keyword=figure+ground+worksheets', suggests a lure to a potentially malicious website. The presence of malformed exploit streams and ML classification further indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://jottigo.ru/wix?keyword=figure+ground+worksheets PDF link annotation
    • https://xebuzoxovekig.weebly.com/uploads/1/3/4/0/134018553/2c55f6dae53f.pdfIn PDF document text
    • https://lewaxirilukuxod.weebly.com/uploads/1/3/0/8/130813115/derozum_zatogixega_tugew_kugizotuxudo.pdfIn PDF document text
    • http://ropufogesuzazeg.iblogger.org/general_pathology_atlas.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/ihekMja/77120898995.pdfIn PDF document text
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/1ab9d0e6.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/hbDQjgj/game_of_thrones_hd_wallpapers_1080p_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/xufojidaju/jiibiiw/ballet_classes_for_toddlers_online.pdfIn PDF document text
    • https://widafesisitix.weebly.com/uploads/1/3/5/3/135321065/2b91a2748474c0.pdfIn PDF document text
    • https://nodaveto.weebly.com/uploads/1/3/4/2/134266094/8a909.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/cjfbjgM/evolution_2_wwe.pdfIn PDF document text
    • https://rigupanikoma.weebly.com/uploads/1/3/5/2/135297472/kitemazoxutanexilola.pdfIn PDF document text
    • https://koxepaje.weebly.com/uploads/1/3/5/3/135350813/milon-pizalagek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/set_cloudflare_dns_android_pie.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/gap_certificate_affidavit_format_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/zabuxipupomiweguwe.pdfIn PDF document text
    • http://kixelekiteduxaz.rf.gd/filehippo_itunes_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/simple_permutations_and_combinations_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/avision_button_manager.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/agenda_format_for_event.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/fundamentos_de_marketing_philip_kotler_6_edicin.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/84226652269.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/35350923298.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 4200 bytes
SHA-256: 3a6cac7fab6fd9f9611cb3432f5acc15cda03641f984c433c24d4921f74466f2
font_01_sfnt_off0000fd07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD07 4956 bytes
SHA-256: ec01865ac563bd13780d1003d09a6076d291f40c6019a973ac64155990a2dced
font_02_sfnt_off00010df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF7 10244 bytes
SHA-256: e2dcdc0a061c42963e362d975a9cf8110bc03f8cb73cad179659a820c2af0780

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