Malicious PDF — malware analysis report

Static analysis result for SHA-256 530b5d7dc406b2af…

MALICIOUS

PDF

80.8 KB Created: 2021-09-07 08:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 676ebe38340b57ad9951898b3a3ef00f SHA-1: 86b8b581fa4457d8b3138c7fe99f84f01004d7a9 SHA-256: 530b5d7dc406b2af2cd897bd02d9b2a201fe36f62fd7aa0843a699b0b6f65a71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=senderos+fronterizos+full+book+pdf PDF link annotation
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/7eeb7b7e62b446674572f9ce4b3da258/kujatox.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/dncl2fabr17guduj4176hdkbg5/dulolovudetopafakubukaxur.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/woduwudexakeparosutevir.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/2jtbjumhro0m3hdqa3nj4fo25t/tijumewomelowop.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/4eefbff55e6c4b7e27a190f69bf14725/4447814590.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/697977907.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/liletomeg.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/21174472007.pdfIn PDF document text
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/97144943079.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffd3aae1b59---254387087.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/c36e968dcf2b8230ddae274615afc7b4/37548977669.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/sibepanamategu.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/mireve.pdfIn PDF document text
    • http://evola.it/userfiles/files/12491793990.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/16944530619.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607803d9714c3---47453929245.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4816c079e5---69955528508.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/5022895834.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/zowufeduvidirazom.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/nopinutoselafilu.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/pegasiburenoxal.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d787003465---82621033018.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_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 10796 bytes
SHA-256: e17f0a2f796078e5d8792cdc91c6dec68edac4ac68a43c4a7643dc5eeef22d34
font_01_sfnt_off0000eead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAD 18452 bytes
SHA-256: 46320f613a49635a1c02b899b85dbfe77584c4fdcd02072ef82f428dc91865a3
font_02_sfnt_off00011e29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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