Malicious PDF — malware analysis report

Static analysis result for SHA-256 23960ef8da5a2805…

MALICIOUS

PDF

71.8 KB Created: 2021-02-09 07:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 59bcd93d933c69c0ca82b24b9da21862 SHA-1: 21636c749c2793794946f0fe28ceb0c80fd81f76 SHA-256: 23960ef8da5a2805bb7689943ef77eb04a9c585fbc78b283d69a3083351bbb2c
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, indicating malicious content. It contains a large number of external links, suggesting a link farm or redirection to malicious sites. The embedded URLs point to domains that are likely used for distributing further malware or phishing 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://maypoin.ru/aws?utm_term=sony+bravia+4k+hdr+android+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445326/normal_5fd6974171227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375203/normal_5ff40ae2979b0.pdfIn PDF document text
    • https://radamokugek.weebly.com/uploads/1/3/2/6/132696621/7070769.pdfIn PDF document text
    • http://trokot-online.xyz/613855853820mgp4.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/MIie3je/97377818569.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410702/normal_5feb15f07ad5e.pdfIn PDF document text
    • http://english-10.site/bossetti_cassazionejt7xg.pdfIn PDF document text
    • http://wonnaturila.space/ghost_hunter_pc_game_free_downloada9jrq.pdfIn PDF document text
    • https://rifituxajigibik.weebly.com/uploads/1/3/4/5/134519767/rozatevewig-segumemusikigu-bibogadod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5fdc73a1e47a6.pdfIn PDF document text
    • http://milanomoda-italy.website/candy_crush_soda_saga_app_free_download8cky0.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/fenatagazise/10639630165.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/36664648154.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/structure_of_plant_viruses.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/2019_wisconsin_grouse_hunting_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/equifax_free_credit_report_online_canada.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_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 5260 bytes
SHA-256: c7f79bd4b8c75c320e9962118b73d113a4b8fe08befe3006f16f5dc922fda505
font_01_sfnt_off0000ed77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED77 10848 bytes
SHA-256: cd7cd0975950a9a35628e4a2a65a7c2f4db1fa8fb181a40d540fb7889e728119

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