Malicious PDF — malware analysis report

Static analysis result for SHA-256 19442dce9e4e722c…

MALICIOUS

PDF

74.3 KB Created: 2021-03-26 07:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c4e1b12a00a8af007a567284562b275a SHA-1: 6d0e8f7422048cfcfe0333973d96758c98c1e40d SHA-256: 19442dce9e4e722c83ff665db09b9afc5f01faf29280e8aca31b5ad80d49f355
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of an SEO link farm or a phishing campaign. The primary external URL observed is https://ponafet.ru/award?keyword=planos+de+herreria+y+canceleria+pdf, which is likely the intended destination for users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://ponafet.ru/award?keyword=planos+de+herreria+y+canceleria+pdf PDF link annotation
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/286a349af.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/awaken_the_giant_within_drive.pdfIn PDF document text
    • https://cdn.sqhk.co/nixagigad/jhhlhf1/arkadelphia_high_school_football_roster.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/italo_calvino_best_books.pdfIn PDF document text
    • https://gefumugizifoz.weebly.com/uploads/1/3/0/7/130739155/bifibilelud.pdfIn PDF document text
    • https://janilunulosuga.weebly.com/uploads/1/3/0/7/130739392/rixogefonul.pdfIn PDF document text
    • http://xanagewofob.22web.org/sivaji_the_boss_movie_mp3_songs_download.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/log_book_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/benanejufa/Pihibjf/47858342546.pdfIn PDF document text
    • https://betetaguzom.weebly.com/uploads/1/3/2/3/132303315/11b9530ce8e4635.pdfIn PDF document text
    • https://bomutakarekavag.weebly.com/uploads/1/3/5/3/135330682/5556366.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/effbe83e-ac3f-40ee-9c08-6d2a7e17566c/jiputesajejasozinuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b311e2ba-5bc8-4e4b-904a-586f52e7904a/68488981424.pdfIn PDF document text
    • https://bf808793-8b46-4c54-8b11-319763181fa0.filesusr.com/ugd/0d018b_6f82603e6afa4a75a461f11ac9ae4c73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0b568df-a8f9-4779-af43-ead363bc5fee/data_structures_and_algorithms_made_easy_in_java_github.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c9815b-20bc-41b7-a1ea-14387d9a7f6a/g-shock_rangeman_gw-9400-3.pdfIn PDF document text
    • http://mekuroxowu.epizy.com/xekiwov.pdfIn PDF document text
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_27f054bc6c6b433f8a9a174c7024b1ef.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_cf2088912337440a9c617a766bf36df6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/34d8182c-3c43-4d97-92a5-2d4596099025/71351752908.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_a8038d1397354af388d21214fe076c58.pdf?index=trueIn PDF document text
    • http://tubusivi.rf.gd/vodojepomaror.pdfIn PDF document text
    • https://a4edf7fa-b057-49b5-8014-e5fd436fbef3.filesusr.com/ugd/c8b2c5_0c7a755af7b24fc4b26ef0553d535513.pdf?index=trueIn 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_off0000e46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE46E 5348 bytes
SHA-256: 90e78d08601e8a8289d04ffaa025c9c99b7696f2e469bbb4fe993845bcc2f55f
font_01_sfnt_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 10776 bytes
SHA-256: 2c071e41d99be49dae2444d89124926df0ed67a3262a284c4c3ae3e03b57ca8a