Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47c314a1de1de0f…

MALICIOUS

PDF

67.9 KB Created: 2021-02-04 13:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 00e40174c8cf1ca5537b4ebd40e8ea55 SHA-1: ae5f08f8c65fece401a1c05bc9809a6b249b9055 SHA-256: b47c314a1de1de0fc0fc1a6ae1aedfa7306d34a76180b79066c43c097c715e53
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. Numerous external URLs are embedded within the document, suggesting an intent to redirect users to potentially harmful websites for phishing or malware delivery. The presence of these links and the overall detection profile strongly indicate a malicious document designed for user compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=ielts+band+score+calculator+idp+pdf PDF link annotation
    • http://baranaydin.org/xedevekatidojopcuklp.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/JhjheC3/bass_pro_shops_black_friday_sale_ad.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/ifnIGWW/battle_angel_alita_mars_chronicle_8.pdfIn PDF document text
    • http://nukowivoxom.iblogger.org/cgp_gcse_physics_aqa_workbook_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/belesobikezi/gg5NKhg/infection_rate_calculator_covid-_19.pdfIn PDF document text
    • https://xoxitugupara.weebly.com/uploads/1/3/1/3/131383959/lasudujir.pdfIn PDF document text
    • http://opit.space/3666449227wlnne.pdfIn PDF document text
    • https://pefolasonej.weebly.com/uploads/1/3/4/9/134901659/norekewaduse.pdfIn PDF document text
    • http://sellforce.ru/963278665994gu25.pdfIn PDF document text
    • http://mgacessoria.online/bell_satellite_tv_wifi_adapter_manualypqv0.pdfIn PDF document text
    • http://sweetmeet.online/press_your_luck_host_elizabeth_banks2iqur.pdfIn PDF document text
    • https://munibejexa.weebly.com/uploads/1/3/1/4/131414516/2e307c7a.pdfIn PDF document text
    • http://thailandlove.site/2000_jeep_cherokee_owners_manualoc83k.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/tihaurT/58531080784.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/g7djh88/89621216984.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xewenofos.epizy.com/55813453134.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_off0000cc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC11 5224 bytes
SHA-256: 072054589ca8e1e5f473009934491d1a098eab548410f5881cb8df1e82487596
font_01_sfnt_off0000ddde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDE 10308 bytes
SHA-256: 4c13c55558ee7c4c2c9b82c9e53a5b4e39fefc238623757a9f1828217cd77278

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