Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64f1305b1f7358b…

MALICIOUS

PDF

83.2 KB Created: 2021-02-15 05:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2e68002d2e81ad66def5075b80d5c25e SHA-1: 7cc830644a73e91ad672079787030434182de774 SHA-256: e64f1305b1f7358b7bade3587fed70ac09c0117d0e3b490fb3d0f6bef86c0205
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a phishing or scam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known phishing lures.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=pmp+certification+course+nyc PDF link annotation
    • http://apple-fruit.space/kunavil2kn77.pdfIn PDF document text
    • https://folejate.weebly.com/uploads/1/3/4/9/134902611/nosuj.pdfIn PDF document text
    • http://begemotiks.fun/punjabi_songs_lyrics_video_download_for_whatsapp_statusd25ke.pdfIn PDF document text
    • http://rentline.pro/770704246059e5mb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459337/normal_5fe874acddbdc.pdfIn PDF document text
    • https://ximapufem.weebly.com/uploads/1/3/1/4/131437784/bixedawizizuxajikosu.pdfIn PDF document text
    • http://vaxuzorokolate.iblogger.org/fire_alarm_maintenance_report_sample.pdfIn PDF document text
    • http://folivapizi.66ghz.com/irrawaddy_dolphin_information.pdfIn PDF document text
    • http://ketupepid.22web.org/song_bpm_finder.pdfIn PDF document text
    • http://shoes-storie.club/26489674396pkv86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maridilalo.rf.gd/42914511529.pdfIn PDF document text
    • http://jefevuxivux.epizy.com/orissa_human_development_report_2011.pdfIn PDF document text
    • http://poravilotizeve.epizy.com/cydia_full_version_apk.pdfIn PDF document text
    • http://duxejuxaxeze.epizy.com/protractor_jasmine_json_reporter.pdfIn PDF document text
    • http://fojobalize.rf.gd/vimewofofewozov.pdfIn PDF document text
    • http://lapekekefexe.rf.gd/nimakaliropokimu.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/masterworks_zelda.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_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 5232 bytes
SHA-256: 1b48189114226e7ffaa7e37e4c654037053264c4d1edfa326b3f68dfe2f3ce16
font_01_sfnt_off00011b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B63 10180 bytes
SHA-256: a7be8e0530f05912e7b06bba0057df0cffee8fc415a9d54cd91b7ad182088e37

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