Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ea93f51149f18b…

MALICIOUS

PDF

71.8 KB Created: 2021-09-23 11:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0adb31101035ae45be020a1b5c485e5a SHA-1: 1fc373d916f3fe45d049490925a46811a4a2d815 SHA-256: 69ea93f51149f18bbbe54c1cf8def693cd9e7a21cc017055b729268e38f67e80
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many on disposable hosting, suggests a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://chcial.ru/uplcv?utm_term=mutilate+a+doll+unblocked PDF link annotation
    • https://redengewinnt.com/userfiles/file/92554068095.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/vibemixazifa.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210917_01B0C8F151C4E8DF.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/97446692110.pdfIn PDF document text
    • http://borisovhlebprom.by/var/upload/file/sepilizubaluzekogapev.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/tebazuwagupajiten.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/zabuxotijuwe.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/xovelebukebanipom.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/74121026451.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/25729028536.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/wamoroj.pdfIn PDF document text
    • https://icrs-as.com/userfiles/file/jelolavuroli.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa86ee3329---72927797211.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/79602300714.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/fitokujibogifewi.pdfIn PDF document text
    • http://marchmontnews.com/imgs/file/fobot.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/pakabojepasoguvexogul.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/a94fb1d0c251955d119d9cf16c443f84/jinizitoxaxikarogas.pdfIn PDF document text
    • https://tuinvandecruys.be/file/75868443974.pdfIn PDF document text
    • https://somogyplusz.hu/files/luganaxawizataberaka.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/xogir.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xemovupun.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/kamewozifixegedu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB73E 10420 bytes
SHA-256: a934a3403fe7f950e11685f804bbf102edc34140bd7c273cb12514ca903a78e8
font_01_sfnt_off0000ceeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 16628 bytes
SHA-256: a5997536e79fd8c8f02af5508645f4e83f68293bbe6bb42830b34e84ec392553

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