Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4e506208e9159d1…

MALICIOUS

PDF

86.6 KB Created: 2021-09-05 02:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7b5d57b231ce6d0e9a028362e7bb5b07 SHA-1: 127b664df6c346a871d46aedef5d49e6d188b769 SHA-256: b4e506208e9159d13c71e118933d624bdce8d2c655762306aec7b253c3ace115
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs hosted on compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9816

Heuristics 6

  • 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.
  • 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://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b602cd344d9---kotifijitojepidolejikodog.pdf In PDF document text
    • https://glycocalyx.nl/userfiles/image/file/pirunopimevudopi.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e7a8553954ae269731a81903a3dac50e/2189018580.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/abf61d64da0d530b46f0b8d3177adc59/popobuza.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/25469668087.pdfIn PDF document text
    • https://auto826.com/uploads/files/bezijubozojaj.pdfIn PDF document text
    • http://artdental.hu/editor_up/pepajixariwimiwabav.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/72245779931.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799484a06cd---pekag.pdfIn PDF document text
    • http://pol2-simf.ru/userfiles/file/bomikavodubodidegezide.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/29986931413.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/307880014c083e562aa252cf0ab9425e/felaji.pdfIn PDF document text
    • http://ellev.fr/upload/files/basatumezal.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/39635369818.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/xegezovusotajezokotikopos.pdfIn PDF document text
    • https://hoavily.com/uploads/files/67219140261.pdfIn PDF document text
    • http://itnetworkconsultingsf.com/helpdesk/app/webroot/img/userfiles/files/vapadeg.pdfIn PDF document text
    • http://mimpishio2.net/contents//files/15461779692.pdfIn PDF document text
    • http://mn-print.ru/ckfinder/userfiles/files/kiwafix.pdfIn PDF document text
    • http://arcos-eff.it/userfiles/files/robiwozoleso.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a874bf16d6---lidupivep.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/4bnpr9500vgm8553ldmju8gadr/fuworilupukafepugirato.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///dezekadomagilase.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3f75cbc22---mewux.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/0c890ac57666eedb84a019966476109b/29750417803.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb9237a5c8---rukibadupidupijivimujeded.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=reolink+argus+2+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDE 21632 bytes
SHA-256: 1dc72d1ee6de32e6cf0716a8436af79f4b5a091335f7cb15e88253705ce11e35
font_01_sfnt_off000104b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC1 16468 bytes
SHA-256: 932b46a2adc85ab428ec46f441f2d27c6a78446597fbcf4fa5ed138b6c304c58
font_03_sfnt_off0001339c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1339C 10712 bytes
SHA-256: 585714f46259b8d137ba97adea8f540d64740e73e766296618096c195860241f

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