Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c7877dfb9e3a92…

MALICIOUS

PDF

77.0 KB Created: 2021-04-14 19:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e5122a21ad634d3844a69eb113623d5d SHA-1: 5716e847596dd8eb54fd80dd30f7d59c1dfebd91 SHA-256: d3c7877dfb9e3a923098399cec672da7a3325af3530f2f2ea8e8e6f16a32737a
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a 'PDF_SEO_LINK_FARM'. One of these links, 'https://zajinet.ru/strik?utm_term=citizen+eco-drive+skyhawk+wr200+men%2527s+watch', is identified as an external URI. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through the linked content. No scripts were extracted, but the structure suggests an attempt to drive traffic to external sites.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=citizen+eco-drive+skyhawk+wr200+men%2527s+watch PDF link annotation
    • https://cdn.sqhk.co/dopuzodopuvu/ihBig5d/match_attax_20_21_bundesliga_release_date.pdfIn PDF document text
    • http://fruit-ita.fun/7719609697biow0.pdfIn PDF document text
    • http://voirly.xyz/rails_date_format_dd_mm_yyyyq15yk.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvazuginu/if5mETZ/kenorowireratusoderolin.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://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_b0dbc213a2a741cf87320dfc0343afb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/welanisowari/airtel_tv_for_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/19564110247.pdfIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_d647e5f8edd349668cea2037dacc84c8.pdf?index=trueIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_da9fef1d9e824b69bbe863378543f4a0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lezerawe/ti_amo_tanto_amore_mio_meaning_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/21515903764.pdfIn PDF document text
    • https://b1b1ed1d-a631-407f-b8a0-2f609481a9c2.filesusr.com/ugd/3e5895_bfac9d68d9f443fb97d504e21f9194ae.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/zixajadupodofakodozozav.pdfIn PDF document text
    • https://ecf1b359-4982-44d9-836f-7e6f5fec4aa1.filesusr.com/ugd/da15c8_5b65f3401144417fb0a5ca9d55695931.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/13392987647.pdfIn PDF document text
    • https://176fe727-baa2-4f6f-8ab0-cddcd97ecb74.filesusr.com/ugd/45df28_f8fdaa611ece434888064c24be5639e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/honda_crosstour_reviews_consumer_reports.pdfIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_f1ed664db14048f5baa294d5fb347f88.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE0 5668 bytes
SHA-256: 5b85b342baa6456120f9f2597d02fecabb48c0077df276af667913c11e092c59
font_01_sfnt_off0000f328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF328 10916 bytes
SHA-256: e00661ff8a12ba91960dc9f1d7476740849f1f0746d241a37016c58da75a0992
font_02_sfnt_off00011868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11868 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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