Malicious PDF — malware analysis report

Static analysis result for SHA-256 da0495f427b2587f…

MALICIOUS

PDF

83.0 KB Created: 2021-09-16 09:50:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14d950d4972da2f6fc01bf2e72bca865 SHA-1: 15863a9e6f74d2b26f506bbb682f4c35a544f35d SHA-256: da0495f427b2587f756940600f00351530678015abbf98d5ecc118feafc814fa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. Numerous embedded URLs were extracted, many of which are unknown in reputation, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://daphongthuyhueminh.com/uploads/image/files/27016381187.pdf
    • https://sanipacific.com/attachment/file/gumonil.pdf
    • http://gonvvama.net/filespath/files/20210901091827.pdf
    • http://newbiesites.com/userfiles/file/54401528050.pdf
    • http://logicparcel.net/uploadsEditorfile/37882341770.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/4c0csuf1iduefut6lrteru9ul4/64854271872.pdf
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/dufurizonedunim.pdf
    • https://dancleland.com/img/upload/file/30712561369.pdf
    • http://olech-rzeszow.pl/userfiles/file/14514354922.pdf
    • http://olddieselparts.com/ckfinder/userfiles/files/fativizofu.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/66011353686.pdf
    • https://sport-jicin.cz/dokumenty/17138403335.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/53758997425.pdf
    • https://anpheatingandac.com/nbloom/fckuploads/file/litatejodazikosevajudel.pdf
    • https://cuisinescartier.ca/upload/editor/file/84220645451.pdf
    • http://nfc.soo.jp/file/moxipowagi.pdf
    • http://sumisaedu.com/FileData/ckfinder/files/20210915_836629BD3CECE42D.pdf
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/81582475941.pdf
    • http://infinijewelry.com/userfiles/file/92127443054.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5468c626f---8007213092.pdf
    • http://vijyaiprismcrm.com/userfiles/files/sinilisovitavadadamuvupum.pdf
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/28837299571.pdf
    • http://gojjang.com/uploads/files/87478403723.pdf
    • https://ms2gacor.com/contents/files/tawoxeranudipeji.pdf
    • https://takarasushimn.com/userfiles/files/37484400833.pdf
    • http://kawana.tech/userfiles/file/tebaxaposimipafa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=fear+the+walking+dead+free+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbb5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB5 16792 bytes
font_01_sfnt_off0000f3c7.bin
35920c5f3be28730493b889158a89d061307e282d7ecfbec0aa85f9aa4c492a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 18888 bytes
font_02_sfnt_off000125d9.bin
9c0758a11a9a356852bd547f27453043723a1fa5d77067789820decd4c87f9bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125D9 10620 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.