Malicious PDF — malware analysis report

Static analysis result for SHA-256 b093a7edbe45b09e…

MALICIOUS

PDF

100.9 KB Created: 2021-03-12 11:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1572cb9f2b1d3d38c3393a448215d726 SHA-1: 8f5021c754ccee39b06010541fc46470d89796f1 SHA-256: b093a7edbe45b09e9ecda753920d0e094b161be3f8213f29317cfafff54de564
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a link farm on disposable hosting and the ML classifier output strongly indicate malicious intent. The primary malicious URL identified is https://resalured.ru/123?utm_term=apmops+2017+pdf, which is likely used to deliver a phishing or malware payload.

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://resalured.ru/123?utm_term=apmops+2017+pdf PDF link annotation
    • https://kanexala.weebly.com/uploads/1/3/4/3/134374151/podubiwe_jutidev.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/fuver.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486566/normal_602d47dd28e59.pdfIn PDF document text
    • https://vesodadetuvi.weebly.com/uploads/1/3/2/7/132740638/4ad5dc636944b3b.pdfIn PDF document text
    • https://sofasiwo.weebly.com/uploads/1/3/4/3/134319993/b28dc3273458bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447437/normal_601e6edb6a0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fe901b8c9fe7.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/icom_ic_756_pro_iii_mods.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484990/normal_5ff4c26075004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_601467938a7ba.pdfIn PDF document text
    • https://govepemifowen.weebly.com/uploads/1/3/4/3/134372812/bidaxaxowe.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://uploads.strikinglycdn.com/files/952740c7-0139-4de2-8aa2-5927e9e0f75c/73824335110.pdfIn PDF document text
    • http://ledufowi.myartsonline.com/balipolitobaxudogilajegup.pdfIn PDF document text
    • http://zetinemimofoti.epizy.com/gugibub.pdfIn PDF document text
    • http://xijewixevav.onlinewebshop.net/wobaxujanowamoto.pdfIn PDF document text
    • http://bogadigoxizalux.epizy.com/kezejiwexo.pdfIn PDF document text
    • http://gamemogap.epizy.com/sustentabilidad_arquitectura.pdfIn PDF document text
    • http://sasuwirakib.rf.gd/kapalotabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/864dcfed-1144-457e-8ef7-7e05a62a4913/how_to_reset_petsafe_shock_collar.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F83 16192 bytes
SHA-256: 6201c79097243077a805a6be7245f65a73dc896ac6bff395c26cd3eff4fbf86e
font_01_sfnt_off00014364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14364 4680 bytes
SHA-256: 340e645bd9061b0513b973d71de892df0db3d85ab7fc2c78577fa09e01ac8b06
font_02_sfnt_off00015350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15350 10652 bytes
SHA-256: 719f67d89515e97a7d91852d4cd96dbcba060ca2caa6f74c636b522406c66b06
font_03_sfnt_off000177a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177A0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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