Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3680223d33d3cf…

MALICIOUS

PDF

72.9 KB Created: 2021-06-08 06:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ab102c84fd78634d86c2f5e272c88d12 SHA-1: ceb3fa801900afc219efa3c565ea4bcfa217eacb SHA-256: 8a3680223d33d3cf015da08f9a6438cf9d2bfc66ad85d11d074b0cee5e3cf92e
166 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, including one that appears to be a redirector with a search query for a technical book, suggesting a phishing or malware lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a malicious intent to use disposable hosting for link distribution. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://synerhu.ru/pbw?utm_term=mathematical+methods+for+physicists+mary+l+boas+pdf PDF link annotation
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/9688664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_60bedc29b234d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463810/normal_60640db06b16a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446789/normal_5ffe9ebc92ff6.pdfIn PDF document text
    • https://ridakikasidom.weebly.com/uploads/1/3/0/7/130739592/b6d8279968f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_6054ba092bb90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455376/normal_5ffc1914b301b.pdfIn PDF document text
    • https://nirawulef.weebly.com/uploads/1/3/4/3/134324477/bb075b4f.pdfIn PDF document text
    • https://miluxeto.weebly.com/uploads/1/3/5/3/135326788/9778306.pdfIn PDF document text
    • https://nopogevoxipati.weebly.com/uploads/1/3/1/4/131410158/zutarubotowo-daxino.pdfIn PDF document text
    • https://jaligudupu.weebly.com/uploads/1/3/5/3/135391073/vetewugewo.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4409246/normal_60b4935fe2446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_603102221e70d.pdfIn PDF document text
    • https://favaruzikab.weebly.com/uploads/1/3/4/8/134871436/6204742.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4490127/normal_60b4c91a2e4c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144479718/75023460347.pdfIn PDF document text
    • http://lexibitite.pbworks.com/f/80024503532.pdfIn PDF document text
    • http://noxixap.pbworks.com/f/fixixoremobaf.pdfIn PDF document text
    • http://pigedigasexu.pbworks.com/f/how_often_do_you_change_keurig_charcoal_filter.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/74924062187.pdfIn PDF document text
    • http://bowawesup.pbworks.com/f/bepekekuxolovigeder.pdfIn PDF document text
    • http://pefumugat.pbworks.com/f/the_south_african_vegan_cookbook_download.pdfIn PDF document text
    • http://rimogeto.pbworks.com/w/file/fetch/144427854/29844620928.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_off0000da5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5F 5644 bytes
SHA-256: 5437d0955f8ee5be42c7b6985ff9cbec365550dc1f65ab7881de4181d67137c4
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 11380 bytes
SHA-256: e3bd83c5670e6a00614f5976a262373173c8043140e2442ab002f5db7f7356d0

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