Malicious PDF — malware analysis report

Static analysis result for SHA-256 90daa8ce8335a81f…

MALICIOUS

PDF

84.0 KB Created: 2021-02-18 05:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fec615e1e55866b697218253aba01e6f SHA-1: 71ddfa68856d60bbf788b58be67c629e895dd9c0 SHA-256: 90daa8ce8335a81fef5dcaf7eaf04f1f2a2af08442afaf164195ed0926fc4e6a
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified mass external PDF link farming and embedded URIs, suggesting the document is designed to redirect users to potentially harmful websites. The presence of numerous external links, including 'https://leonvi.ru/wix?keyword=nefarian+guide+vanilla' and 'http://bonapimum.iblogger.org/36979803543.pdf', supports the attack pattern of luring users to external resources.

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://leonvi.ru/wix?keyword=nefarian+guide+vanilla PDF link annotation
    • http://bonapimum.iblogger.org/36979803543.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/nabelixolavowu-ridesijelek.pdfIn PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/e76c27a.pdfIn PDF document text
    • https://kekebamifibem.weebly.com/uploads/1/3/1/6/131606854/lotafepux_xukoradojok.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/lelixegexanete_lusesefenakenel_xejabi.pdfIn PDF document text
    • http://bamimutekinawaz.22web.org/bangla_song_bestwap._in.pdfIn PDF document text
    • http://guxiket.iblogger.org/bigg_boss_season_8_all_episodes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dadupawo/juxivijumubugu.pdfIn PDF document text
    • http://gidigeja.rf.gd/kizapalagavimuxax.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/vewevumeme.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/add_hyperlink_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/chemistry_periodic_table.pdfIn PDF document text
    • http://vetarobafawuk.epizy.com/lexadapu.pdfIn PDF document text
    • http://tafujeloraxofo.epizy.com/96307421592.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/debussy_preludes_book_2_sheet_music.pdfIn PDF document text
    • http://denonewozififuz.rf.gd/reaction_of_acid_and_metal_worksheet_answers.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_off0001010e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010E 4620 bytes
SHA-256: 10babca3cc7fdc9aae26110df6e964618da8e6f4584835ed8c5b35e82e60df08
font_01_sfnt_off000110cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CD 10472 bytes
SHA-256: 973f5e13a5f8cdcd9a07ee84e7e35cc86baace0dd0c84f7ef0030060b3f0c088
font_02_sfnt_off000134a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.