Malicious PDF — malware analysis report

Static analysis result for SHA-256 a854baea34b56105…

MALICIOUS

PDF

83.9 KB Created: 2021-02-28 05:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d67dc6e8c076a098316daa39781e8e9c SHA-1: 2acb29ef720f10369ef0c30170671e19ea07f3ca SHA-256: a854baea34b561055a544c4bec77c6dfb1d01101224e5f7c713d32d616664f92
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'zajinet.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body, though heavily obfuscated, contains references to 'Excellence resorts jamaica' and 'wkhtmltopdf', suggesting a lure to a fake website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/123?utm_term=excellence+resorts+jamaica PDF link annotation
    • http://zubiki.top/mean_value_theorem_worksheetuaaxj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474218/normal_5fde48e68788d.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/19241190711.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366359/normal_5fece86d602b1.pdfIn PDF document text
    • http://fakurivevid.scienceontheweb.net/usmle_rx_first_aid_step_1_express_video_2013.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/2UgeJja/draw_story_game_episode_3.pdfIn PDF document text
    • http://hotsales-com.xyz/19316216106hq1j5.pdfIn PDF document text
    • http://bigowet.xyz/how_can_schools_reduce_climate_changefsk3v.pdfIn PDF document text
    • http://autoupgrade.website/23167510952k3uuf.pdfIn PDF document text
    • http://opensol.xyz/29334344545ng4x1.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/ggirias/81003860383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443594/normal_5fda388938062.pdfIn PDF document text
    • http://yellownatural.space/fire_red_vba_cheatsj0zqv.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/Wgggyjg/vaxuxemuwidowudu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392442/normal_5ff5311c0e8c6.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/jiwisi/22592988252.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/definition_of_crime.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/runepolomonujapife.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/bully_anniversary_edition_revdl.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/gufupunoti.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D11 5048 bytes
SHA-256: c6f19bd8daed87e6aefb7accdfd44690d40b7c4e622ceb7f59fe4c5ab68bacf5
font_01_sfnt_off00011e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2F 10600 bytes
SHA-256: 3140317164377519309efe7b37a89dd36786269b9c1e3f7be8b591b34f7b6b63

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