Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b79b93ca108ef4…

MALICIOUS

PDF

73.0 KB Created: 2021-01-06 07:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 92c91e5cc9ac722a191a1519f81e52f1 SHA-1: 1b475b5c09502dd43f84165f24b18598f02da88a SHA-256: 05b79b93ca108ef48e4064286ab6d90e770254b648bc43f35fc0a298e238d28d
244 Risk Score

Malware Insights

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

This PDF file contains a large number of links to external websites, many of which are hosted on disposable domains or known redirectors. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest an attempt to redirect the user to malicious content, potentially exploiting them via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://gettraff.ru/aws?utm_term=dragons+rise+of+berk+strategy+guide In PDF document text
    • https://cdn.sqhk.co/rosomugimo/EhaTgfU/milton_barber_shop_brooklyn_robbery.pdfIn PDF document text
    • https://wuzivizafexun.weebly.com/uploads/1/3/1/4/131453021/404312.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/Pjcjgij/bedar.pdfIn PDF document text
    • https://fupuvoriru.weebly.com/uploads/1/3/4/4/134494751/fuzefap_somalepul_bamejererug.pdfIn PDF document text
    • https://jedudelovaki.weebly.com/uploads/1/3/4/7/134731231/bdf8b1.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/cgejgbF/88806423619.pdfIn PDF document text
    • https://cdn.sqhk.co/kunutewiwit/18jeF5M/kalofulimunexa.pdfIn PDF document text
    • https://gewupokisata.weebly.com/uploads/1/3/4/6/134606569/8941713.pdfIn PDF document text
    • https://dofixojibol.weebly.com/uploads/1/3/0/8/130874360/d8b0c8425bd.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/575e5c542c.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/gjhJiif/mexican_football_federation_twitter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf035ef4-8e12-4947-9886-9a04fa9c6d38/degojuxijedobajadoguz.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/bitowutuzafizug.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/merutokekopafazepimix.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_off0000e114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE114 5348 bytes
SHA-256: 36c2a3e5f47ea3d3f1144879c7642ff835f99f5b259c4ee25fb1094f87e59280
font_01_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 10540 bytes
SHA-256: a9f94729359f389ce108ded38de9156457bd91a2d13343366cbec343d1374379

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