Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d160f20b1be3e0…

MALICIOUS

PDF

95.5 KB Created: 2021-03-07 20:52:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 1057ed2d421ce5285067d2755b4fb968 SHA-1: 27e7485b25c7c4cace6b41a44472f03ba8b66764 SHA-256: 16d160f20b1be3e0764fbbc988e90cf078a8f3b47d339d6e7752a926f02c9992
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/wix?keyword=garmin+forerunner+645+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475565/normal_602a152bc050a.pdfIn PDF document text
    • http://wemuwetafivaxe.sportsontheweb.net/31033886509.pdfIn PDF document text
    • https://rovizefodizare.weebly.com/uploads/1/3/4/3/134309954/95e6e.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/83485724205.pdfIn PDF document text
    • http://xsafak.com/gas_absorption_in_packed_columnf4udn.pdfIn PDF document text
    • http://teaitalis.space/processos_interativos_homem_meio_ambienteuk93t.pdfIn PDF document text
    • http://kuxogajow.iblogger.org/jatidisuwoxod.pdfIn PDF document text
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/takipatadisurujaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403808/normal_5fcd563a4da85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453335/normal_5fc74d0b81a9f.pdfIn PDF document text
    • https://jevilorusijugif.weebly.com/uploads/1/3/0/8/130874204/9182885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475992/normal_6035221242274.pdfIn PDF document text
    • http://tdsevsvet.ru/dorurepusebajemuzise4he04.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/tikefitifitinafj1t8m.pdfIn PDF document text
    • https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/1581121.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420756/normal_5fddcd2c62e6b.pdfIn PDF document text
    • http://wutulesarox.iblogger.org/audit_corrective_action_report.pdfIn PDF document text
    • http://damodudajipofem.22web.org/google_chrome_apk_for_pc_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sikopenopod.epizy.com/amar_chitra_katha_books.pdfIn PDF document text
    • http://pikegasek.epizy.com/ralidegodekututeforozi.pdfIn PDF document text
    • http://sametil.epizy.com/charade_full_movie.pdfIn PDF document text
    • http://wedizakur.epizy.com/fagikiruji.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10327 3624 bytes
SHA-256: e79e4a9a509f7ed776cfd7e152fdc927c86ff0dd5be1eca1f6644b0d1dc64667
font_01_sfnt_off00011004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11004 5656 bytes
SHA-256: bed96fa1229486a2891eb3588a8ba27a00f168fcc14ec5b27163b9ae75a7c180
font_02_sfnt_off000122f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F1 17336 bytes
SHA-256: 5db270ba56115847576c4d8a30ba57ba3a66240dc53a7a0afaad2a97a315c0d3
font_03_sfnt_off000157d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157D9 16204 bytes
SHA-256: e7534c07323d6ba79a60176605f93e810fd4bb01ed1d8f03dfee481ee4cae317

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