Malicious PDF — malware analysis report

Static analysis result for SHA-256 9907458b89f4196b…

MALICIOUS

PDF

117.3 KB Created: 2021-07-05 17:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fced36e82fe215628784fc71c6533584 SHA-1: ffcde44046ea097a936a45f4d402ff4de45e74a6 SHA-256: 9907458b89f4196b9be4f98e370e936c228dec88151835a5cca31f2a520d27d2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://booklandbooks.com/userfiles/file/nokusadupilapumajozak.pdf In PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/2vidukai3vv69jhnm8r3jqfg9t/83840794900.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/g2f6pogk0oimgf1drjgcolqq61/dakexoxenakebefomesatiwe.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/p3fhf5uugba9ku1ve97v52a9ih/7743713700.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/sudamoxuviwazaped.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160aa17a615d22---depejaxixu.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e07b050b64---zitoziwivi.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ded68457dd---xojopebixemibidivagax.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/03b010b8e0e34281b33f34b4b9e4f2e8/silika.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/o3c4s5n91h4hi6u1rvnbbna0p1/78397503061.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708cc8a08c5---fitesevojilipejinomijeku.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/sasuzupafavexokulom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19ec8a14e3---xaxev.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce34cca567---bexis.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3af44deb30---82798588735.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/mfa15ffuh0p2r1pusg4esc6g2h/60066279687.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdff74b9a73---medejonujotixuf.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/7673407788.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd223b1bd5f---8168741390.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a3547a4dff4---42768140054.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fea5cca7a---zefefaxete.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22e3e2ba17---41936358760.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d4f7464ba---ninaroloz.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/nikiduvotomizebojoj.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609532b928a0b---tatel.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/vivenalenediji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=functional+organisation+advantagesPDF 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_off00016c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C0A 10688 bytes
SHA-256: 99e85197798966fdf8ee71b36cefc1ca71ec86d7195d5d88ed9c605befcc516c
font_01_sfnt_off0001847b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1847B 16652 bytes
SHA-256: d70113a2d965da7cd9c25656ef3cc0827deb97121744fc3eb9fdc5da50243957
font_02_sfnt_off0001af6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF6D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1