Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6f2e496ded8881…

MALICIOUS

PDF

78.8 KB Created: 2021-03-15 12:59:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 460a667a2c50b7f7764fd87e4b13633f SHA-1: 36e160f2be1b08ad75b46de8106b50f1e49e998a SHA-256: cc6f2e496ded8881cb00e31b2fd5ef13728fbede0a68603a030db33ee16aafac
156 Risk Score

Malware Insights

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

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 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://bologen.ru/award?keyword=inspiring+thoughts+a.+p.+j.+abdul+kalam+pdf PDF link annotation
    • https://mifurujuxix.weebly.com/uploads/1/3/3/9/133997148/wijisivawojob_bironume_nufosekemiru.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/FpTFifc/fruit_nibblers_pc.pdfIn PDF document text
    • http://gitaxodepa.iblogger.org/fobapedumeliseta.pdfIn PDF document text
    • https://cdn.sqhk.co/revikokelobu/nX7npwj/vulevuzopi.pdfIn PDF document text
    • https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/bativenosaz.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/hhghfvU/68811805941.pdfIn PDF document text
    • https://fusidaxeda.weebly.com/uploads/1/3/1/4/131453850/tebetuzetanebo.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://s3.amazonaws.com/nijudow/chamaram_malayalam_movie_songs.pdfIn PDF document text
    • https://6558ac43-984d-4e3a-97a1-dec8860611ed.filesusr.com/ugd/c73740_6bbf3efcda4c404ca3811c8c1f7269d3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sabegokek/kozogenafomedu.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/zifesotajul.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/mogunosiwafabinumipijigo.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/xitunajuxelupazi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/friday_the_13th_game_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/tovasagupumes.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/16891674543.pdfIn PDF document text
    • https://ff19a39e-637c-4fc6-80cc-750024e8dd37.filesusr.com/ugd/d217e2_120a36245a9a4c3b8cc4d51fbccd2c82.pdf?index=trueIn PDF document text
    • http://nuworeri.epizy.com/medea_euripides_english.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/how_to_reset_voicemail_on_alcatel_flip_phone.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_off0000e8a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A2 5468 bytes
SHA-256: be7460f52927683387856ff5e4ec6748b927e212acb0ea4dc8d3d2aab6728992
font_01_sfnt_off0000faff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFF 10792 bytes
SHA-256: 567147e477178302349640a7597f41d07461a39bc431a2fc1e24550b2ecbdf3e
font_02_sfnt_off00011fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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