Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d25be41bf03ad6…

MALICIOUS

PDF

80.3 KB Created: 2021-03-21 21:37:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8762cb773f0ddb2e68e384e84c0284e8 SHA-1: 6d56f4f9c4e8c92f7783e8a70ad8353ffb31710d SHA-256: 15d25be41bf03ad6c12169007402cdd342e6eb823ff2ca1ed2ab96a10e35bdfa
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a non-clustered link farm on disposable hosting, reinforcing the phishing/malware distribution vector. No scripts were extracted, but the sheer volume of suspicious URLs points to a primary attack pattern of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/aws?utm_term=when+i+was+puerto+rican+summary+chapter+4 PDF link annotation
    • http://puditefifu.22web.org/limbsaver_recoil_pad_remington_700_synthetic.pdfIn PDF document text
    • http://zapixexarepol.medianewsonline.com/7322637546.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/hbggwig/31592421683.pdfIn PDF document text
    • http://bukanugizini.mygamesonline.org/lonijepobinalekatipab.pdfIn PDF document text
    • http://youtube-subscribes.com/5137205893222m62.pdfIn PDF document text
    • http://kobasobapina.22web.org/fimojezoz.pdfIn PDF document text
    • http://yoganchik.space/cradlepoint_mbr1200_default_password6hvxt.pdfIn PDF document text
    • http://italiahot.fun/pokemon_nuzlocke_rom_hackx17w8.pdfIn PDF document text
    • http://indital.fun/printable_graph_paper_1_4t9cgc.pdfIn PDF document text
    • http://ita-women.space/fekapamimukufi1un2g.pdfIn PDF document text
    • http://fofafowazu.66ghz.com/show_sport_tv_apk_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/tojegaxamox/fijBjal/22588229304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a72a44ae-2aae-4d6a-a6c4-235301d0a62e.filesusr.com/ugd/57436b_509eba2507e948fba6343326aaf02943.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abe085d4-53c2-4887-853b-98e3661e4d01/pepojapu.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_58bf1407b6c3400bab562bdcbbbb8fc1.pdf?index=trueIn PDF document text
    • http://jimarol.myartsonline.com/environment_and_ecology_notes_for_upsc_prelims.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d6cc37d-48f4-4949-9ab2-585db8fdfad0/goffman_presentation_of_self_social_media.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_1a3988474177442ebf0501cdacc511b1.pdf?index=trueIn PDF document text
    • http://koduwutuvage.onlinewebshop.net/79279503956.pdfIn PDF document text
    • https://729282ec-1290-4cbc-9302-cf8a24acd4c7.filesusr.com/ugd/42c189_e2410a1a627c4c92a7e687d458ecc43a.pdf?index=trueIn PDF document text
    • http://pejibuturu.epizy.com/22981273621.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_26c928f2ca0140328bd58be7c15ff52c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFABD 5436 bytes
SHA-256: 36a3642e849fe4648c6b2450b0531b1c1379fc0ea2575458153ff69295fffe98
font_01_sfnt_off00010d32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D32 11200 bytes
SHA-256: 20b27e28acc0036c248c17e7df6fbe4c5673f47556a03b9816951df1e901e6f4

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