Malicious PDF — malware analysis report

Static analysis result for SHA-256 11229a6941e70814…

MALICIOUS

PDF

82.7 KB Created: 2021-09-16 15:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ea2d920dae8b57e5bb24ea613ca005e2 SHA-1: 8c11f14170163d8c62a47701edc3fe86e55e677c SHA-256: 11229a6941e708140c8e685572673201dd880ffa18d1ce16a512da8d8d184f95
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with many pointing to suspicious domains and a heuristic identifying it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://aordonez.com/images/contenidos/files/pemilakaditebokux.pdf In PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/38287249682.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/sidakugegiwelekuber.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6d735d02d---labunarejorowoniwifususif.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/zotosunefawe.pdfIn PDF document text
    • http://multi-accueil.fr/ressource/site-image/files/71010456036.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a968f51a3c---xuvafafel.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/gotakutav.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/debivatetaganod.pdfIn PDF document text
    • http://megaprestige.ru/uploads/files/36772808990.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/viwumijafuvesinosodin.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/95816147914.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/teredoxaxuvoxolalo.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/8062059438.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/29327844753.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/1008492733.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/potoweperadanunisote.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/4787398242.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/suxatapidavoxaguvipilod.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/1666701995.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/32622660125.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/55145731858.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/fiwomasutubabajepojevagun.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/bavivogabatuw.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/mojerixoxaxugev.pdfIn PDF document text
    • http://aromacosmetics.bg/assets/userfiles/file/26861418268.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=all+of+my+hero+academia+moviesPDF 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_off0000dc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49E 18240 bytes
SHA-256: bf48b1c53d5318c81d8f88adb458c629180c55807d98e6be78e6cbce906c9570
font_02_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 10700 bytes
SHA-256: b4883a603820b31c3419bc27a31f9a19a4df60d0d84c9081910748f6db6478d0