Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc230457211ec2b…

MALICIOUS

PDF

79.5 KB Created: 2021-04-02 09:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 46b124d0b3d57fefe6c286ba5fb8dc51 SHA-1: b2ff84045a9e62a291cba262d0a6c73dc449d86d SHA-256: 4cc230457211ec2bf55cc5cd449faeea3ea2e3df446534ef4bd1d6ca03cf9ee4
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO abuse tactic. The embedded URLs and the PDF structure indicate an attempt to redirect users to potentially harmful content.

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 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://gimoguvi.ru/award?keyword=audio+visual+aids+in+extension+pdf PDF link annotation
    • http://patamekuzon.iblogger.org/hd_tamil_movies_2018_tamilrockers.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/guvivebixifedopo.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/sejajutumora.pdfIn PDF document text
    • https://vuwapelenepaje.weebly.com/uploads/1/3/4/7/134705438/1084198.pdfIn PDF document text
    • http://viruxego.mygamesonline.org/keremevonesebivabe.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/latelodiz.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/karpman_triangle.pdfIn PDF document text
    • http://jiteruruw.sportsontheweb.net/golds_gym_xrs_50_part_19.pdfIn PDF document text
    • http://jipuvojenibomig.22web.org/ruvojudanotonuku.pdfIn PDF document text
    • http://vumajuzatijerak.getenjoyment.net/babaylan_zeus_salazar.pdfIn PDF document text
    • https://majivuwuwu.weebly.com/uploads/1/3/2/6/132683475/sekodomoropobepom.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://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_e9295757956249ec8bfcd36e04f5b03d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/7122182917.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/sufafakamivugipifomateve.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/chrome_push_notifications_android_example.pdfIn PDF document text
    • https://7fd92c66-d3af-485c-b7a9-31529ddfb1b5.filesusr.com/ugd/997d0f_88517906a26646b784d523541f95eab1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/android_tablet_apps_2018.pdfIn PDF document text
    • http://joberemig.atwebpages.com/buku_akuntansi_biaya_carter.pdfIn PDF document text
    • http://bexexakik.myartsonline.com/bossa_nova_guitar_tab.pdfIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_3148f494aabd4c7b97889f946291c20f.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA5 4936 bytes
SHA-256: f3314cba3f149e2ea45a7da252d4e3ee1284b1cc173a474c78227186e22a8e81
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 10208 bytes
SHA-256: 67d7428b053e1c97fa8be894612c58ed28c2860c84e7d55a09c2b31f35b2a00d
font_02_sfnt_off00012284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12284 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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