Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcab5653e9fc6c13…

MALICIOUS

PDF

83.5 KB Created: 2021-03-24 18:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: f2802d77396437356f78a72dfb0efd04 SHA-1: c684c07a9734980105ab3eea8cea47b46fb2fad7 SHA-256: fcab5653e9fc6c13b0dd6297679018ffdfeb2c27d3dc792dd0f3eb7eb5cf3758
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. While no scripts were explicitly extracted, the presence of many external links suggests an attempt to lead the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://vilenefex.ru/award?keyword=easter+hymn+cavalleria+rusticana+pdf PDF link annotation
    • https://cdn.sqhk.co/nebinefis/hdJW2Jn/52744135672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455886/normal_5ffa958cd89c0.pdfIn PDF document text
    • https://lewobagapu.weebly.com/uploads/1/3/4/6/134666085/7e2cb0ee.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/ferrari_california_for_sale_dallas.pdfIn PDF document text
    • https://cdn.sqhk.co/xivudebisov/D7iev00/ihealth_myvitals_app_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_60531b108f343.pdfIn PDF document text
    • https://mewasopaligesar.weebly.com/uploads/1/3/1/4/131454012/2312735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_602d0740c19e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_603ff0340a261.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383795/normal_604dcbd66ec28.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/O1ggXii/gubevotizawaxanavelipoze.pdfIn PDF document text
    • https://cdn.sqhk.co/vagofedewat/Xtiieic/jurassic_tribes_events.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/5NYgdae/life_after_death_movie_2018.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/23921606510.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wobanunep.myartsonline.com/andante_lenguaje_musical_primer_curso_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/money_loan_agreement_template_philippines.pdfIn PDF document text
    • http://wigunegulawiko.rf.gd/tiwigubibadisajanimibesox.pdfIn PDF document text
    • http://todifisafi.atwebpages.com/28307545129.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/uc_browser_new_version_java_app.pdfIn PDF document text
    • http://nufaviziziji.epizy.com/jilimuko.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_off000106c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 5516 bytes
SHA-256: e98d44ad07fdfa1b352bdfdda78ae4b0b4d160df92271679663047df45d6efe8
font_01_sfnt_off00011972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11972 11780 bytes
SHA-256: 9e0efda472bb5bc069d465a6acf71d11567dfc90d56bf60f2f7a81a5bed56ac5

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