Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47bdbc4efdb98b9…

MALICIOUS

PDF

85.5 KB Created: 2021-08-21 08:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0111d1cbe43d4ddb117a663dc984ef38 SHA-1: 0e5fcd9cf57c441a65d97fba7f92b845c1c00160 SHA-256: e47bdbc4efdb98b9f88e19272ed988c9f1cee9a4ab692f783b1c430cf9c3fd65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple compromised CMS upload links and disposable hosting further supports its role in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://catamma.ru/uplcv?utm_term=family+tree+forms+pdf PDF link annotation
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/00ca26da3acbf76b7055ab8dc7df4014/92535808362.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/famepu.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d04c977d0---toragiritukomotulediwu.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/96465907052.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/wonogelidipogu.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c2efc1813---29773469114.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/15465440082.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/numip.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/uk2ngc5qh24fo4inclbe1flfo8/zosuvafoxodotuki.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/77744581913.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab5538e1f7---4954594913.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16076b94007a56---xedumalotodalizuzaresu.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/88307271729.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/39755876103.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c96650c9c---jomegowinin.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d6098940c548a35c1e4ae0fd3d4a3cd5/retunojagusenewogot.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/duleparovagisabim.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e065bbef21---6970347819.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607665a09bc3b---varaz.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/37805156693.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/07b3b292865d5113e951a53b4997cc66/jopujomutisozozepujagi.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/vbu26isk8rutkn6s73re9h0rbb/dulixude.pdfIn PDF document text
    • 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_off0000ea34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001024b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024B 10648 bytes
SHA-256: 3c18926edee57052d30b0e1d9b97d08985f317442f599be01a9748d446424a35
font_02_sfnt_off00011aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAC 17728 bytes
SHA-256: e8702bf2368a996d98b2bce2e281ebbbc2bbf229532a1af879a5f3c42d453316

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