Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b403a6360e1ba28…

MALICIOUS

PDF

70.9 KB Created: 2021-02-21 12:44:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a6646c7b2286db3528896894a7bbc88a SHA-1: 9b933fb3b1f87d20e4d5d34814bb69af8b3f9aa4 SHA-256: 8b403a6360e1ba282b2409bcfced82eb343c42f6cc5e4e1fcd96fdecd0fe3f99
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The document body, though partially corrupted, suggests a lure related to popular manga, aiming to entice users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/123?utm_term=the+misfit+of+demon+king+academy+manga+online+chapter+14 PDF link annotation
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/watefadosidawojono.pdfIn PDF document text
    • http://jitokinut.iblogger.org/tonicity_and_osmosis_worksheet_answers.pdfIn PDF document text
    • https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/69284e8e547ea6d.pdfIn PDF document text
    • https://zatakigufexip.weebly.com/uploads/1/3/0/7/130738978/7772817.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wisunomimat.epizy.com/pumuru.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/79104672816.pdfIn PDF document text
    • http://nazedizabif.rf.gd/gevesobomidafe.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/behringer_xenyx_x2222_manual_espaol.pdfIn PDF document text
    • http://xaloluzagaga.rf.gd/conjunction_worksheets_grade_5.pdfIn PDF document text
    • http://gaxodisesi.rf.gd/96677265934.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/bazaar_billionaire_song_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/factory_reset_apk_no_root.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/winob.pdfIn PDF document text
    • http://juwesavel.rf.gd/cadbury_dairy_milk_bar_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/budog.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/template_joomla_3._x_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/anestesia_epidural_elsevier.pdfIn PDF document text
    • http://wexugemo.epizy.com/xuwamobamixotebam.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/90641889174.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/60193662617.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_off0000d6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B1 5824 bytes
SHA-256: a5aa29c8ad35f131840f6b32132b26ff753c2df60a9f24bc6e0480631201522c
font_01_sfnt_off0000ea6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6D 10184 bytes
SHA-256: 474ccf96f6b9123034ac05a6dec09753f94012f0cd133c6193ba36c370ed7456

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