Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ad5e2c0b6d1c8b…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 01:29:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fdcb5006469aa715ed1ef852a1cf1378 SHA-1: b28b6d43a5c9eebeb7ace3447421de6f4788f689 SHA-256: 01ad5e2c0b6d1c8bbed6862425b7059e9e5819ff95c03cf13328baafccd23b99
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with at least one, 'https://xajibur.ru/award?keyword=behavior+meaning+pdf', flagged as suspicious. The document body is heavily obfuscated, but the presence of external URIs and the overall structure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xajibur.ru/award?keyword=behavior+meaning+pdf PDF link annotation
    • http://zuregazezoral.mygamesonline.org/the_one_thing_planner_discount_code.pdfIn PDF document text
    • http://xemisudufi.iblogger.org/66430606736.pdfIn PDF document text
    • http://moviesaddaa.online/nfl_playoff_picture_2020_week_12snl49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_6044254e8fba5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5ff9a484c3028.pdfIn PDF document text
    • http://qlemelest.online/aquapark_io_mod_apk_2._8jxcb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385435/normal_5fcbb5bb9100f.pdfIn PDF document text
    • http://waxawazurutane.22web.org/free_able_bunco_score_sheets.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/upstairs_downstairs_brain_worksheetu8fex.pdfIn PDF document text
    • http://aycotoro6.xyz/vinesimivawofuvo4eg43.pdfIn PDF document text
    • http://tikanaw.mypressonline.com/51634487608.pdfIn PDF document text
    • http://niwadeg.mywebcommunity.org/ctet_previous_question_paper_download.pdfIn PDF document text
    • http://lojasamericanasbr.com/fajudufarakinaz6dnzk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_60318444b1e6e.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/roxawo/solucionario_mecanica_vectorial_para_ingenieros_estatica_10_edicion_capitulo_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/best_android_one_devices.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_173ab741e46347fbb6f2fb8be6f82601.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_4099ac562d9d455a8273fff82a6d2c52.pdf?index=trueIn PDF document text
    • http://zilekej.epizy.com/audacity_chorus_effect.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/aqualisa_quartz.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/tinoxi.pdfIn PDF document text
    • http://tosuniwenalob.epizy.com/53071939740.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_off0000f955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF955 5352 bytes
SHA-256: 5f7fd45c86f68ea42537735830466c92e9160c7e7e1828e25c6bf1e2141b5f33
font_01_sfnt_off00010b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6D 10460 bytes
SHA-256: 3f43c080923ef71652f25381945ca0709d5de1eac073a1760340e08dcc5ad4b7

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