Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e62a7e8c9722a03…

MALICIOUS

PDF

78.8 KB Created: 2021-06-07 20:43:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2a5d35f0976c9f2d28ddf1594f6e3faf SHA-1: 8f5c6799cc7cad3be7a625e4221324cecb58a272 SHA-256: 2e62a7e8c9722a03fab8943a6811b0e8193e33fee7c0546e23d3516910b12129
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL leading to a disposable hosting domain and appearing to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'piano sheet music'.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/123?utm_term=inside+out+camila+cabello+piano+sheet+music PDF link annotation
    • https://tunilawogipafex.weebly.com/uploads/1/3/2/8/132814387/38149.pdfIn PDF document text
    • https://bisudika.weebly.com/uploads/1/3/4/3/134366448/bikopakudesaxeru.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/6740554.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/zeripejojakefinibux.pdfIn PDF document text
    • https://robesiladobaluj.weebly.com/uploads/1/3/0/8/130813577/3131050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_60b8271110ef2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5fcefdd1ea339.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/1527251.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://uploads.strikinglycdn.com/files/7e57ebfb-6b6b-4ea0-b77f-45b95084d9e5/32434728772.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/how_to_use_garmin_echomap_plus_43cv.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/58056010122.pdfIn PDF document text
    • http://mojuseraneno.pbworks.com/w/file/fetch/144623709/how_to_give_points_as_mod_on_twitch.pdfIn PDF document text
    • http://luwosotatex.pbworks.com/w/file/fetch/144736755/bosawefawuxo.pdfIn PDF document text
    • http://xifatarege.pbworks.com/f/how_to_clean_printheads_on_epson_artisan_1430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a4411d2-0c54-4ca4-9823-748cad582106/makelevakurovuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9319cb61-d503-4edc-a68a-8db75eec209f/how_to_change_photo_on_pubg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af2fb268-fb72-410d-a30d-c1ed300cf224/how_much_does_the_financial_times_newspaper_cost.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_off0000e94d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94D 5176 bytes
SHA-256: 011f16eb27d8860fee0e1665b216205f3d28b58d65d12da5c6520f53ab01f16d
font_01_sfnt_off0000faaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAA 10908 bytes
SHA-256: 120665fe7193092b91d8f90f887402697ef1f591be93117872dabdba9c23df43
font_02_sfnt_off00012013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12013 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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