Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b6e46ad6705962…

MALICIOUS

PDF

91.6 KB Created: 2021-09-05 22:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1b9faaf0f88723fbf1c890e8905e806d SHA-1: 39964a64302fc0fd87774115790e31b361965672 SHA-256: 59b6e46ad6705962fda451b20ea9739a57d16cce9a5a695c2cceeb4108addbb2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to compromised websites, likely intended to trick the user into downloading a password-protected archive. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' strongly suggests this malicious intent. Although no scripts were directly extracted, the presence of numerous external links and the ML classifier's high confidence indicate a malicious phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f331d8d760---zumojokepusu.pdf In PDF document text
    • http://tajeer.co/userfiles/file/62340678824.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f12c5b8fa4---geniweriveb.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/85226714521.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/merilefutelusefasuzok.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/500d42e5ac01895160f8aa1131d1a9e9/bisadunotobaxegi.pdfIn PDF document text
    • http://avandcie-energy.fr/ckfinder/userfiles/files/lojolelutozunisagakol.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/cbbdd80da0ac8c663801ef3876ad36cb/buxolexufarudap.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f36fd82c8---widizipi.pdfIn PDF document text
    • https://adrfarysz.pl/userfiles/file/novatibikoloje.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/sozumazisorugad.pdfIn PDF document text
    • http://ruresept.ru/files/file/47401950628.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/90623942672.pdfIn PDF document text
    • http://orlickachata.cz/files/files/toguze.pdfIn PDF document text
    • http://artside.org/data/temp/file/3115492683.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16075ff1e00a3d---susavujosulidaxejopo.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/nodaxajoxe.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/11657752700.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/no018solkmh5pgoogohklcog50/88776093642.pdfIn PDF document text
    • https://h1t-urlaurora1-turbo.com/contents//files/13648330054.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/20836430911.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/fisar.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/buxerixipuk.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/86331594570.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/22672489347.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=compress+pdf+to+zip+macPDF 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_off0000f991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF991 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A3 20616 bytes
SHA-256: 70e7f55e65a4c4206fce5ec64c56941661fc88f9accd795fb841890588ccdc56
font_02_sfnt_off000147c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147C0 10724 bytes
SHA-256: 31924786e79d5da684c1ee81a5805968cbb98c99d8597790f07cbf1bc15c63a9

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