Malicious PDF — malware analysis report

Static analysis result for SHA-256 b849f68cf81109d7…

MALICIOUS

PDF

86.0 KB Created: 2021-09-21 21:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f8be2587fbc0417395abdd562e660652 SHA-1: 450b33e223fd59ee3e9da8727cb2338d98d996b5 SHA-256: b849f68cf81109d7ee189caca86905279ed03f18c4329f5ba314d072558f815e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are structured as link farms on disposable hosting. The presence of embedded JavaScript, flagged by heuristics, suggests the potential for malicious code execution. These factors indicate the document is likely a lure designed to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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 https://smidgel.ru/uplcv?utm_term=123movies+one+night+in+miami
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/60330054126.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/94i5in6np9hrp7qa010jdjlrr2/16808623885.pdf
    • http://brenno-tojestto.pl/userfiles/file/66183966691.pdf
    • http://honmamon-s.com/img_seminar/userfiles/file/32191748484.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b84dd5664---rowinikiv.pdf
    • https://sportnazona.bg/f/uploads/files/xogasa.pdf
    • http://www.heksan.com.pl/file/29519119413.pdf
    • http://ace-pharm.com/upload/files/67911192721.pdf
    • http://zzweien.com/d/files/40387559249.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/9j6qk5rd10mhaoro8qd55980m2/lakoferisarexufavibud.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313ce113e69---93441288497.pdf
    • http://www.parinet.fi/tiedostot/files/lekimadofamefix.pdf
    • https://www.gryf-wet.pl/ckfinder/userfiles/files/tuwezapopaxadowajoga.pdf
    • http://taixingchem.com/uploadfile/file/20210907160202054.pdf
    • http://bbdecontra.com/userfiles/files/87964602364.pdf
    • http://yongchengtech.com/uploads/files/202109021520312302.pdf
    • https://pasationtravellers.com/root/FCKeditor/file/75794921207.pdf
    • http://geostudio.eu/userfiles/files/36101654936.pdf
    • http://templeton.sk/userfiles/file/89363000642.pdf
    • http://objets.immoweiss.lu/userfiles/files/lebutis.pdf
    • http://choragwica.pl/userfiles/file/21559012515.pdf
    • http://topbondtape.com/uploadss/file/31689512841.pdf
    • 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_off0000eae1.bin
77ada0447126d228cbfcb3ed0e35e05c8e0a8a6279cea87db384a72539be6e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 10724 bytes
font_01_sfnt_off0001036d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1036D 16792 bytes
font_02_sfnt_off00011b7f.bin
967f3e3820f9f07bc8238b8ece40d1ce97c59d0a5ef1732e9b834da2ef4b45b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 18104 bytes

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