Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9143598b65cef16…

MALICIOUS

PDF

82.3 KB Created: 2021-04-08 03:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bb33c86d57a68d1f7d7003ed994fc229 SHA-1: 26afd9a391fdfdfe907e658d3f3a8bb46ee205ea SHA-256: a9143598b65cef160aef108fade647ba1ba6ba8394a140403ab0c9afd022d4e3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://vilenefex.ru/wix?keyword=dane+bowers+band PDF link annotation
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/xadamuda_nudaganib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461211/normal_60320c0a858f2.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/8idGhiy/xamepom.pdfIn PDF document text
    • https://besikedu.weebly.com/uploads/1/3/1/8/131871581/mumimoganefawugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_6050051bd0a20.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/QdvhamH/84439843854.pdfIn PDF document text
    • http://mezajozugabaso.getenjoyment.net/8849632132.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/apparato_digerente_scuola_primaria.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_6005d738eee25.pdfIn PDF document text
    • https://cdn.sqhk.co/kasavakujosi/YpJhg38/wopade.pdfIn PDF document text
    • https://lurafavef.weebly.com/uploads/1/3/0/8/130813461/powuvijotonewob_lilur_jonap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/931c82db-9a1b-4f9a-bfc0-53deb6d6dc94/turtle_beach_elite_800x_manual.pdfIn PDF document text
    • http://vobununebufipu.rf.gd/3779641851.pdfIn PDF document text
    • http://jesuwipefeg.rf.gd/xukubobelobiwuvuso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/773ab26b-1345-405b-aa52-4d075816bb04/57793712151.pdfIn PDF document text
    • http://refubexat.epizy.com/medial_cuneiform_bone_definition.pdfIn PDF document text
    • http://lufirapubabe.epizy.com/walit.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF914 4680 bytes
SHA-256: e1ad2fe2d53365c42a7633e675c9743aaefd7632756dd3c5754243b34c526040
font_01_sfnt_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 10896 bytes
SHA-256: 4ccafdfc625394dd9bfaf7953eabcc70283706ce848fc50df35d0e68fa137f84
font_02_sfnt_off00012e7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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