Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d3c73f358828438…

MALICIOUS

PDF

92.8 KB Created: 2021-06-30 17:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2df5bb39a12437b0923a16011f99e108 SHA-1: f999630f8efb57c54f3679327487e04e377d8e76 SHA-256: 3d3c73f358828438384d7f06d0da4baeab351ff74ee987268d3dfd10a8b51ead
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple websites, many of which are hosted on compromised WordPress installations or disposable domains. The primary purpose appears to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 6

  • 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.
  • 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://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c4c5ad1fbce1a9c11e64c6e485da2196/kijepivirabunuwewiteliju.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/8f2d5c9317d3736e76f40ae79086beba/sidokatipomuviwezu.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/4629mj0cn3pg4bfrjhtas4l3r1/xavugo.pdf
    • http://eltonltd.ru/sites/default/files/uploads/8418512899.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/99db4b6384b75f41cd3a6f09411beff5/lapevawudixebejobofepuf.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a41692c853---38399432588.pdf
    • https://kraftyz.in/ckfinder/userfiles/files/dewofetawe.pdf
    • http://budoprojekt.eu/obrazy/file/pupidodife.pdf
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/ba5467661ee4e601b705ea529e6915fe/97842896463.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8d0eb459f---bemijifomabu.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/h3otbmtqo3c00sa1hfeeeh5d26/nekepezixoduforaz.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/ce6a4j64976p2p8hnknccg4qtu/64172830648.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608776827a84a---kiruj.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32f3d3297d---maririsin.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/d2ihpttmeb3sthonkpm97qtjhq/paronikajered.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084063472532---xeruwapegipuwelulaliwul.pdf
    • http://kingalbertltd.com/uploadedfiles/file/vudurifu.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/66ca480cfb0371ca506c712dc5036e9c/liperimavenelila.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/8185ea33be8156e69e84eaa9dcd7d430/79024692791.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/gq35i40g5kerii80ppq85rpug4/sefejutekawegevivofizun.pdf
    • http://auto-spec.ca/fck/file/munuredu.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16099093cb54e7---54961394395.pdf
    • http://arebiatours.com/uploads/files/bibenekedere.pdf
    • https://kochitaxirental.com/ckfinder/userfiles/files/72777869302.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=baby+spino+ark
    • 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_off00010487.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10487 16792 bytes
font_01_sfnt_off00011c99.bin
8f93d8c05f30472673f7de61fbb115a74071cfc73619c024ae8e54f409afe76e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C99 19784 bytes
font_02_sfnt_off00014f0b.bin
e3598e315f08ad3a44bd0ea41b117ae5aad4f47cbfc9461110bdccdd86193b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14F0B 10368 bytes

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