Malicious PDF — malware analysis report

Static analysis result for SHA-256 696b8abb7ff56b03…

MALICIOUS

PDF

79.6 KB Created: 2021-04-01 20:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b25389ecdac08b391791a915d6846da1 SHA-1: f553273d1d95dcd513e4758ca325eeb1c9df38e4 SHA-256: 696b8abb7ff56b03a88837e107baf9195bb4372db037aeff311f1eb35cfd5e4b
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://fokemale.ru/123?utm_term=vcenter+server+for+windows+6.+5 PDF link annotation
    • https://cdn.sqhk.co/dodirorip/jd6Bjc1/retopobe.pdfIn PDF document text
    • https://zinivopupo.weebly.com/uploads/1/3/4/3/134386920/1626117.pdfIn PDF document text
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/c5f573cc0c3a.pdfIn PDF document text
    • https://damesijegimu.weebly.com/uploads/1/3/4/6/134624484/xavixapesimazawi.pdfIn PDF document text
    • https://cdn.sqhk.co/fapulatonupe/jhcZjfS/5778239499.pdfIn PDF document text
    • https://dukopovofozevi.weebly.com/uploads/1/3/5/2/135295758/667464.pdfIn PDF document text
    • https://zakogekumepaxu.weebly.com/uploads/1/3/4/5/134598029/7623160.pdfIn PDF document text
    • https://xedagiwaki.weebly.com/uploads/1/3/1/8/131856626/waromukerekus_bamazejefike_zolelufumenom.pdfIn PDF document text
    • https://lebotowim.weebly.com/uploads/1/3/1/4/131438344/b66b0e22af13c5.pdfIn PDF document text
    • https://cdn.sqhk.co/wavudasawete/xjhifia/59173575540.pdfIn PDF document text
    • https://nozodipipagim.weebly.com/uploads/1/3/1/4/131438171/nuzulinebet.pdfIn PDF document text
    • https://zatozidebowetam.weebly.com/uploads/1/3/1/3/131398213/nelisilu.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/XoiJcie/seven_deadly_sins_grand_cross_jp_download_pc.pdfIn PDF document text
    • https://mogunugive.weebly.com/uploads/1/3/4/3/134381007/62b1b8b3b06.pdfIn PDF document text
    • https://cdn.sqhk.co/xidizizo/hhA91ig/arduino_uno_working_principle.pdfIn PDF document text
    • https://napuximijagebi.weebly.com/uploads/1/3/4/7/134766840/da010b3d748e1c.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/xalexojaxipud/77679425411.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/rock_candy_xbox_one_controller_walmart.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_off0000f9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B7 5200 bytes
SHA-256: 9b68c68d557af181bdb12637f8f6fcbead757e6309bd510b63a43c2b6846e0c1
font_01_sfnt_off00010ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA5 11008 bytes
SHA-256: 81b9ca75bc120fd4fc2792b9b1511969cbf218e74e4ef86be28a6b5de403b944

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