Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9f844fb01f17c6…

MALICIOUS

PDF

74.8 KB Created: 2021-07-08 02:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d99f8ac0fafb27ca8afefce77500fd09 SHA-1: 752bcda679d049af11d1bbca778811faa60d8079 SHA-256: fb9f844fb01f17c6e71a447c3e64e3b085f67bc4236ec3c3fd0b3a614688bef8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to malicious websites designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=the+ghost+files+5+pdf+download+free PDF link annotation
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607451bbd5fc8---50836509147.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/gemaxudapejusunagalar.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67c50d01d2---buwopetifa.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/84291843883.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/14889671838.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/kazuvolusolekow.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/mp45v2q3uia0kk4v0f37sk4jn0/67071794142.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7f3757af2---diwawifunuk.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/6ce7a805beca5eb8d5a037139e0ec0fc/nekevaribape.pdfIn PDF document text
    • https://aedwea.com/upload/foto/vafukoporebefuduwunadobod.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/0aab573c9c4945c207011067b7de730b/6577054755.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a275c7d998c---65419271157.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d374047ac7---torafijidutab.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/57668554734.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/43961795084.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/i07acia5g9h1f53bjuid74576o/bufiruzotev.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/uos2rd7iho4rpp677ikn8023i3/55487027597.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d688173c173---rubobijomejapozabugosepik.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/fusodelafodobug.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0ba862469---taxarinija.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbfa56d7f1---wogarapedukev.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/15817361920.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c942cef3938---numopapugetazuj.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4c020645d---36528442147.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_off0000c20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1E 16440 bytes
SHA-256: cecac68dc50653eed0a97add38b3324559106f23bea6b43cf7506b36c3396ff3
font_02_sfnt_off000104b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B3 10960 bytes
SHA-256: 83b39d16d39e65d1c9fe80996c1f65dc9f2494dc826d06f145b44e34332e3e6a

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