Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e50a331957fd1c7…

MALICIOUS

PDF

97.3 KB Created: 2021-09-09 03:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a0bae8df804360b54fc870fdb498323d SHA-1: c759b333f2ccb1c1a47e1264ed0c21a63b948a82 SHA-256: 7e50a331957fd1c71eb4531f54587ce05f93ac7926a13d32e8c2beabecd38dab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://op-gold.com/ck_image/files/62057713372.pdf In PDF document text
    • http://moyamoya.center/images/hand_uploaded/files/23757663574.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613054dbed7a4---18006487359.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f95a25b461---kudonisolitaluzamid.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/16264151138.pdfIn PDF document text
    • http://magooferta.pl/uploads/fck/file/wosozukodunina.pdfIn PDF document text
    • http://lycee-elm.com/userfiles/file/18302175831.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16136656189ea0---43653825673.pdfIn PDF document text
    • https://bengalroys.com/ckfinder/userfiles/files/30752182197.pdfIn PDF document text
    • http://farashimirooz.com/files/6310621084.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/75991330646.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/wapubovixefikabakazupu.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/080349141532.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/81097792100.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/25027168103.pdfIn PDF document text
    • https://miltonmattox.com/userfiles/file/31298914385.pdfIn PDF document text
    • http://hflchw.com/upload/file/pujurogotelatukupud.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/tusaxumemi.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/duzusewezikukevodowa.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/palulosuloxesuve.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/puxagupewopenojudoga.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/fuwudapitodukukitusewaj.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210906022235.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/97865250001.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/10958974589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=watch+a+quiet+place+2+online+streamingPDF link annotation
    • 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_off0001168c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168C 11180 bytes
SHA-256: 3fa160ad78cea06ea334dbac6b7ea4b33e5ea9339c5fd80b3e38c71af9d955f3
font_01_sfnt_off00013045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13045 18548 bytes
SHA-256: 361b1d13c6f4f1d87db0554bee36664d7dbd59635ab0ba7ba21b0b0b3a074a10
font_02_sfnt_off000160c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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