Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7d22fe9ab1f5dd4…

MALICIOUS

PDF

78.4 KB Created: 2021-05-11 23:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 003eb6fb5ab6473d37f551e911b1b695 SHA-1: 428ab1619b0e5aaa67c6eee1149cb27b8685ba2b SHA-256: c7d22fe9ab1f5dd423e3231766de3d70c2a72cf0eca4feba91006ff07f1c1ac6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a potential phishing or malware distribution site. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://maypoin.ru/strik?utm_term=hay+cursos+de+ingles+gratis+en+internet PDF link annotation
    • https://gilukuxuzi.weebly.com/uploads/1/3/4/4/134494221/gofokusebigorax.pdfIn PDF document text
    • https://wuwonerosetopux.weebly.com/uploads/1/3/1/6/131606808/lebulakejejofo_jipujipekulib_kemed.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/SgjKmgj/11stone_2lbs_in_lbs.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/9c4752f7c230.pdfIn PDF document text
    • https://nuniladolu.weebly.com/uploads/1/3/0/7/130775245/xirajapovasu.pdfIn PDF document text
    • https://zokilare.weebly.com/uploads/1/3/4/7/134767859/886403b.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/Glujcij/project_management_academy_discount_coupon_code.pdfIn PDF document text
    • https://jopuxokoxi.weebly.com/uploads/1/3/4/3/134350500/renawepigefup.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/6fc690253e596ee.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/trigeminal_neuralgia_ppt.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/4122151.pdfIn PDF document text
    • https://xoludifatak.weebly.com/uploads/1/3/4/4/134477652/5fe3da7.pdfIn PDF document text
    • http://foramodosug.mygamesonline.org/95739726722.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/pidufozu/kaththi_tamil_songs_doregama.pdfIn PDF document text
    • http://wekijedi.epizy.com/auto_chess_mobile_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/digavimaxaxegavetatuz.pdfIn PDF document text
    • http://zobovobewuw.epizy.com/agile_software.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/65681586059.pdfIn PDF document text
    • http://nowageg.onlinewebshop.net/popajukisofodekus.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/9697383156.pdfIn PDF document text
    • http://xopalotopobeda.rf.gd/dufab.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/tepopatofagajebexeji.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_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 5172 bytes
SHA-256: 05037e74ce86a5d6abfc1fdfccd47b8ec0133e3bfeb0bf445e452d7a92102b27
font_01_sfnt_off00010211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10211 12508 bytes
SHA-256: 64e23259f857c9f5756b0a1f8b130e9587f421e8ac474a0dea5c73ec2bbecde7

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