Malicious PDF — malware analysis report

Static analysis result for SHA-256 535f068f8e6012cc…

MALICIOUS

PDF

87.0 KB Created: 2021-03-06 04:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 38c5c4ab201ca1de83ba9056b383f835 SHA-1: f54df0220befe325f144a98a52e4399c4e6aa34d SHA-256: 535f068f8e6012cccba11df28513913dc7420e9d87e2a103b723980ce1a7fc19
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier. The PDF contains a large number of external links, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://druttle.ru/123?utm_term=beautiful+disaster+book+series PDF link annotation
    • https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/28191bf18700b0.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/infantino_flip_advanced_carrier_recall.pdfIn PDF document text
    • https://zozolunefa.weebly.com/uploads/1/3/5/3/135325744/ce4b4c5f.pdfIn PDF document text
    • http://bubuwem.iblogger.org/insurgent_movie_full.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/94243225097.pdfIn PDF document text
    • https://xarupasate.weebly.com/uploads/1/3/6/0/136055515/kekim.pdfIn PDF document text
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/5521397.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/raxunutinuxupafifejomon.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/1966694437.pdfIn PDF document text
    • http://nebofonuve.mywebcommunity.org/birds_and_the_bees_lyrics_idk.pdfIn PDF document text
    • https://gamidamivagug.weebly.com/uploads/1/3/5/3/135324690/47097378.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/pirosisob/pujog.pdfIn PDF document text
    • http://zilowovuv.atwebpages.com/what_is_a_full_service_grocery_store.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/astonishing_legends_podcast.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/zoladuwubavuzemojomifapem.pdfIn PDF document text
    • http://tesoduv.rf.gd/69036896426.pdfIn PDF document text
    • http://satikemapobivix.epizy.com/webunajivofewegugen.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/ligob.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/ijazat_gulzar_song_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/badminton_league_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/78844474002.pdfIn PDF document text
    • http://milebulijulami.onlinewebshop.net/wizuwob.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_off000117b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B3 5156 bytes
SHA-256: a24ace333298e6d2fa72779ef90a0fd260a0852b8c29adf53242191b0c55ecd4
font_01_sfnt_off0001294c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294C 11200 bytes
SHA-256: 1a5789346f66483f0d9511f0dbf6a1a81a1f893b0cec2a981f02575cdab26522

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