Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a5d81313279d4da…

MALICIOUS

PDF

71.2 KB Created: 2021-04-02 15:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7918d78b4669ef3364b9b8a297c130bb SHA-1: 55e71368462850ca14474e3d6643d5c4a26b0ca4 SHA-256: 0a5d81313279d4da3bc69189f80a7d7b8850243331e8a9eab19e04b849fffcd7
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=control+systems+engineering+google+books PDF link annotation
    • https://fexafunoketu.weebly.com/uploads/1/3/4/8/134868662/9378465d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378607/normal_60098434c6318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460970/normal_6055dfd4ed049.pdfIn PDF document text
    • https://lomowurepiv.weebly.com/uploads/1/3/1/4/131437546/pufevofot-taradufa-nozasaf-pipeboxog.pdfIn PDF document text
    • https://makukojubava.weebly.com/uploads/1/3/0/7/130739489/jigemusidili.pdfIn PDF document text
    • http://stonersfranchise.com/biddeford_heated_throw_warranty1hatj.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/fewidoma_mujabixeravil_zifevapenepiwo_pizakewajezug.pdfIn PDF document text
    • http://yourdesk.website/jebesil8shlk.pdfIn PDF document text
    • https://ximazaka.weebly.com/uploads/1/3/2/7/132712593/febc029609ddf.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/Ofhhher/vitagan.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/vepogozumuda.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_6009a4509b5e5.pdfIn PDF document text
    • https://xewomilofapo.weebly.com/uploads/1/3/4/8/134878854/xemizekagubipisikoge.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5feee10abc71c.pdfIn PDF document text
    • https://cdn.sqhk.co/govazilose/fnjheCy/75031176865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456376/normal_603c4f02580b5.pdfIn PDF document text
    • http://legendbilisim.com/wiwizinavorulunhallg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/6819768027.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/vopomiku.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/barclays_online_statement_password.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/91258278879.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/how_to_remove_samsung_desktop_stand.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_off0000dae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 5004 bytes
SHA-256: c7e00d81810e652c3552452967956cea65d5d02f31d9707be8ecec35221cc6c3
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 10480 bytes
SHA-256: d6fab1e91b39ef34e3e6e288074fc38ca7704a6eb6a4b542e48f69d4e93b59ca

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