Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f12d94044262e1…

MALICIOUS

PDF

77.0 KB Created: 2021-04-03 20:44:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: b4534910b6b1a8818f50842df5253b3e SHA-1: a3ad2d5adf63aa22dbdf34212b6569aa84053e7d SHA-256: 63f12d94044262e130edf43ad3268d3742440785553e596a17dec55d89d51ac3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to S3 buckets, suggesting a link farm or SEO manipulation tactic. The primary URL, 'https://maypoin.ru/award?keyword=cognitive+behavioral+therapy+adhd+pdf', is presented in a way that mimics a search result, likely to entice users to click. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=cognitive+behavioral+therapy+adhd+pdf PDF link annotation
    • https://cdn.sqhk.co/notigagamu/hfjfhij/xadafizemeni.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/kokupaku.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/h0agfDO/top_vouchers_code.pdfIn PDF document text
    • http://kanaxade.mygamesonline.org/awakening_the_giant_within_free_download.pdfIn PDF document text
    • http://dadefuxafovub.22web.org/71083291687.pdfIn PDF document text
    • https://cdn.sqhk.co/nevawanipo/gegiez4/recharge_online_vodafone_fiji.pdfIn PDF document text
    • https://cdn.sqhk.co/lagexodefajo/evheTid/look_up_guided_reading_levels_for_books.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/jIiiqhh/zitomajomezejiwe.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/nezanurugega/lozetadiviviluwav.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/mejebukifogezidagaz.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/loregolazidi.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/kuwepakedev.pdfIn PDF document text
    • http://sadozejeko.myartsonline.com/niveralawumom.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_bc363b79212844158965691098156f9a.pdf?index=trueIn PDF document text
    • http://tofilijewok.atwebpages.com/autocad_electrical_tutorial_bangla.pdfIn PDF document text
    • http://bemerufupatovi.rf.gd/63882769706.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/aladdin_2019_movie_songs_pagalworld.pdfIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_9962d8561bba4e4da0673966b4016e1e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gudukupir/risexejeratulunasizuxire.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_1120d5f4a5ef4a7b999a3745510fc6f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/97089360050.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_4ac009b1b6e84b90a9353e46d8c9d522.pdf?index=trueIn PDF document text
    • http://xuwiviw.rf.gd/carnitina_scielo.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/igneous_rock_identification_answer_key.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_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 5332 bytes
SHA-256: e1b0603a4309ad7f19b1f4c6d80175f59f489c9e2f7e831e79aab8f49c098841
font_01_sfnt_off000102af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AF 10504 bytes
SHA-256: 022abd4b16a54ecfefcc6d6b1bcc5ebca5e8927c8ba19a8ebaa896f1101e17e3

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