Malicious PDF — malware analysis report

Static analysis result for SHA-256 b489774e4254fd61…

MALICIOUS

PDF

110.8 KB Created: 2021-03-27 14:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f55c402a0cffc87e2e7d5e00a7e68ac0 SHA-1: ac4c6ac31e00a309d30d5fd99d76140eb400a728 SHA-256: b489774e4254fd617b22328802708eaa849b854ab04724924301bb18b4aeea58
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/award?keyword=cisco+2960+commands+pdf PDF link annotation
    • http://load-bcp.com/project_management_risk_assessment_formk0zwe.pdfIn PDF document text
    • https://rawoxozuk.weebly.com/uploads/1/3/2/6/132695352/6027791.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/allelopathic_effect_of_chromolaena_odorata.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/monica_robinson_naacp_interview_transcript0sf0o.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/monarizanuji.pdfIn PDF document text
    • http://lukiduxipapep.mywebcommunity.org/25591435108.pdfIn PDF document text
    • http://sogixusi.medianewsonline.com/8845435033.pdfIn PDF document text
    • http://pihodze.com/microsoft_autoroute_2005_free1xelq.pdfIn PDF document text
    • http://x-bionic.shop/what_does_the_acronym_ip_stand_foru8hea.pdfIn PDF document text
    • https://putusura.weebly.com/uploads/1/3/1/6/131606782/musuxelawapiwipeto.pdfIn PDF document text
    • http://fudazozotakaxal.mywebcommunity.org/87372771302.pdfIn PDF document text
    • https://sonikegusu.weebly.com/uploads/1/3/3/9/133997348/rotabubexedebe.pdfIn PDF document text
    • http://boribonabone.mypressonline.com/kamefimimupijuzalulo.pdfIn PDF document text
    • http://salet.store/what_is_coming_to_netflix_february_2021n27zp.pdfIn PDF document text
    • https://bafuzonexive.weebly.com/uploads/1/3/0/7/130739369/3440218.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/58177838707.pdfIn PDF document text
    • https://neveloso.weebly.com/uploads/1/3/1/4/131408616/95c13cf9066b.pdfIn PDF document text
    • http://kipegujodup.getenjoyment.net/caltrans_highway_design_manual.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/altos_odyssey_mod_apk_downloadvu9b2.pdfIn PDF document text
    • http://usesoda.pro/9716812822105v9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pijosufun.myartsonline.com/english_textual_concepts_and_learning_processes.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_off000173c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173C1 5664 bytes
SHA-256: ad96e57e1a7414e464fce5645b571e35c7315e20a321f5abe5378f1a2cba5bb5
font_01_sfnt_off000186ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186EE 11196 bytes
SHA-256: 5da8060f1628230a93d3e0ccfc0f841142c48ad540c45319f867fbd1da25264c

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