Malicious PDF — malware analysis report

Static analysis result for SHA-256 05833de01e3c7062…

MALICIOUS

PDF

70.8 KB Created: 2021-09-19 06:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb9170e5082a55cc1cef5d24ffb42a6e SHA-1: f746ee2f77f657cdbb67a763e2a464c7683ca262 SHA-256: 05833de01e3c70623b6ad2750e453d917cb25fa797adceeefffc19d1b3001c82
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior, suggesting the document's primary purpose is to act as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 4

  • 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://crysiq.ru/uplcv?utm_term=pokemon+sun+and+moon+3ds+rom PDF link annotation
    • https://airflow-skateboards.com/upload/file/82541490743.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/391f1ff50d0a040a8ff3f1138d40c094/givepogum.pdfIn PDF document text
    • https://olivierdaulte.com/ckfinder/userfiles/files/bokemetulelufuf.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/25178285838.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/dokisiwitozaxololofozabiw.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/71393213709.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/44358389589.pdfIn PDF document text
    • http://clickvay.com/upload/files/45532545824.pdfIn PDF document text
    • http://huerural.com/uploads/image/files/61429352551.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/vizug.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/4397447379.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/gojigajetuxekasesirawege.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/51567173834.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/womijeb.pdfIn PDF document text
    • http://yushendesign.com/images_fck/file/1631914595.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139251f89c7f---xibim.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/fikujiregiwugubodazifak.pdfIn PDF document text
    • http://haraj-alqunfudhah.com/userfiles/file/59699138698.pdfIn PDF document text
    • http://heizler.hu/files/file/tesilororuberi.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613d74e2cf359---87195830122.pdfIn PDF document text
    • https://sportuna.be/ckfinder/userfiles/files/53241488948.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/juseziwuxufuzuvan.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/24217679512.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/zapebuvepiwubikomasemute.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/vilap.pdfIn PDF document text
    • http://greenld.com/userfiles/35977502653.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_off0000b4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDD 16100 bytes
SHA-256: 4a24b2eb171de7ec9a659486de2ef0cd4e50651a74b37509c4b53d503f28c528
font_02_sfnt_off0000f5b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B1 10540 bytes
SHA-256: 4676deeb4f7829b89c5c10ef3b71350214884427219c0f0de1d63090556bc050

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