Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6f74ac3ab28b3b…

MALICIOUS

PDF

76.2 KB Created: 2021-03-17 09:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 101acd2b76624338b9eaf6a16347acab SHA-1: 2a0b3988cbf2a829263c015948d0c59c0bb695a5 SHA-256: ee6f74ac3ab28b3b62da51a7c99943dbd760e5340e30bee72c21f95acc90e37b
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to suspicious domains and are likely part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically a phishing or trojan distribution attempt. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://botokaw.ru/wix?keyword=slick+magneto+500+hour+inspection+manual
    • https://cdn.sqhk.co/tokokoxisuf/p38ifgd/bsc_ka_full_form_kya_hoti_hai.pdf
    • https://didogetikazem.weebly.com/uploads/1/3/0/7/130776535/mijuliretuwipexel.pdf
    • http://mosquito.codes/181039979313pf8v.pdf
    • https://fadufavibog.weebly.com/uploads/1/3/4/8/134889314/loxoganedejedol_naberud_xevozexuxovonoz_vesefevusixeb.pdf
    • http://vonexalux.sportsontheweb.net/63392399293.pdf
    • http://luchdobro.site/belijovijoloxako8lvwb.pdf
    • https://cdn.sqhk.co/nidaruzada/haxifih/block_craft_3d_game_apk_download.pdf
    • https://cdn.sqhk.co/wazuvegox/iPQgem0/sports_marketing_jobs_chicago.pdf
    • http://on-arenas.com/marketing_portfolio_template_powerpointvrdmw.pdf
    • https://cdn.sqhk.co/pixazizaze/eiffYgj/lewufawajojibudukeviwofag.pdf
    • http://igclienteam.com/nox_android_emulator_windows_10_64_bituretv.pdf
    • http://pidedex.22web.org/13015467566.pdf
    • https://cdn.sqhk.co/tidilotofuka/Pjd7Gv9/eureka_math_grade_8_lesson_11_answers.pdf
    • https://gotitodurafa.weebly.com/uploads/1/3/4/3/134351762/roxiwosigew-wosebulikufo.pdf
    • http://cloudmarket.website/erosion_landforms_of_glacialj5yv3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_010946fffbc34da798c42ecc0df7c000.pdf?index=true
    • http://tupesom.atwebpages.com/benefits_of_using_technology_in_education.pdf
    • http://sovotovagito.epizy.com/heart_failure_guidelines_2013_ppt.pdf
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_8feb1b90471240dcb46b836a8d8d22a1.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8be.bin
594343c803f470c62d9c43f3009ec7f53ddaf5e48137d09cf1780bcd96b84ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 5780 bytes
font_01_sfnt_off0000fc42.bin
5ebf49957a26f8f97e1944bb27cd2801c772962e8858094eddd64147466840d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC42 11476 bytes

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