Malicious PDF — malware analysis report

Static analysis result for SHA-256 395a0a0e5ce3c014…

MALICIOUS

PDF

78.4 KB Created: 2021-04-08 21:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 757d8741fd047502ceb910270908d784 SHA-1: 8f59cac19a52cb50b4e3d8f05233973c5bdf4cbb SHA-256: 395a0a0e5ce3c0149237af5918b9ea8f8d3836c314b79333df251edfef0897e0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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://maypoin.ru/strik?utm_term=what+is+the+average+salary+of+a+marketing+major PDF link annotation
    • http://mefizilexofe.66ghz.com/ishq_barse_boondan_song.pdfIn PDF document text
    • http://dupomixu.iblogger.org/lakatitava.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/bhagavad_gita_chapter_12_in_gujarati.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/how_long_to_see_results_from_5_2_diet.pdfIn PDF document text
    • http://xalowazejadiv.getenjoyment.net/fotesof.pdfIn PDF document text
    • https://jekazaneret.weebly.com/uploads/1/3/1/4/131455475/3502235.pdfIn PDF document text
    • https://jutemutugitut.weebly.com/uploads/1/3/4/6/134617260/8274369.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/are_ford_maintenance_plans_worth_it.pdfIn PDF document text
    • https://nipalevix.weebly.com/uploads/1/3/4/0/134017489/2369720.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/6536079.pdfIn PDF document text
    • http://pavozuketogo.mygamesonline.org/90655379291.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/selosapa.pdfIn PDF document text
    • http://joxorapux.22web.org/20494574243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muweluboxakok.rf.gd/24282623506.pdfIn PDF document text
    • http://degevojorak.myartsonline.com/hindustan_unilever_limited_products_price_list.pdfIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_522833b912a34fb7a682d0c50a838135.pdf?index=trueIn PDF document text
    • https://5b3a2631-baab-4d1f-8161-183aa5bfd7a2.filesusr.com/ugd/5dc2b7_82c6eecb56084f89a6249517e413cb88.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_00c82b9b52a447948295478e65594fc5.pdf?index=trueIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_5cdcb3fbd02b4988b750fe4f33eecd07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/acne_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/kipod.pdfIn PDF document text
    • https://dc688580-c0ec-4ade-910b-7abffd870ab4.filesusr.com/ugd/096b61_9daf59b853204088808a17cb8c6915af.pdf?index=trueIn PDF document text
    • http://tulifal.onlinewebshop.net/11811572147.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/bemogenebexuze.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_off0000f19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF19E 5496 bytes
SHA-256: b2dcb9d1c3ebc838e9fef884d42480c1f4353107edcd33ad9102c63ac842b6cf
font_01_sfnt_off00010446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 11060 bytes
SHA-256: cd8a3a902ebfe317059fbed2b2c2505ff80aa73c307fd0f72d9f035afa0af0a0

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