Malicious PDF — malware analysis report

Static analysis result for SHA-256 5284de6f67ce251b…

MALICIOUS

PDF

68.5 KB Created: 2021-06-01 00:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 35b4156658390949a33e4fd2b3623d7a SHA-1: 87434929e1c68f50d31198f337c22bda2e8d6b4e SHA-256: 5284de6f67ce251b203fd2f2c38c73455f2438edd88f57e063586fcbe8b988d8
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. 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 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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://bologen.ru/123?utm_term=aoql+ka+full+form PDF link annotation
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/vobileroj.pdfIn PDF document text
    • https://tedaliduvif.weebly.com/uploads/1/3/5/9/135957254/virikibaju_kevalazebi_lerejujolizes.pdfIn PDF document text
    • https://gofubajub.weebly.com/uploads/1/3/4/6/134632898/jomafagixomod.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/fonosatesos.pdfIn PDF document text
    • https://gibelugexafop.weebly.com/uploads/1/3/4/6/134687098/nuwijo.pdfIn PDF document text
    • https://fopidezajot.weebly.com/uploads/1/3/4/6/134688075/rupil-daleluwafe-zamedason.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supatibu.pbworks.com/f/naleler.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144428886/35762678790.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/jorumamapajeliwazozidu.pdfIn PDF document text
    • http://palixazoke.pbworks.com/w/file/fetch/144428298/xewenoxideg.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/f/56580817071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a8c2a6-5ea3-41e7-b222-7bbffcfe2860/vamajulotamawolajenokox.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144421761/9396918819.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469a2876-802c-4d9c-b45d-298df5daa4ca/dovimepowuwosim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1ab33e4-af97-4340-bb54-48c14ff9ad28/munigowetopow.pdfIn PDF document text
    • http://zuvevetub.pbworks.com/w/file/fetch/144422562/las_7_claves_del_exito_de_disney_resumen_capitulo_2.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144428499/how_to_reset_jvc_kd-s79bt.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/las_colinas_course_guide.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144426021/ejercicios_sencillos_de_diagrama_de_arbol_resueltos.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_off0000d097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD097 4912 bytes
SHA-256: 8e097712158db686ce2d031d006b639048bd367d5984ee59f51d4ae3ca8cf6ef
font_01_sfnt_off0000e144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE144 10864 bytes
SHA-256: 28ced987ac07f1d43ff76aa2497b74adbcc91704c12715b0491ec077a347bd19

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