Malicious PDF — malware analysis report

Static analysis result for SHA-256 076a9cd350264c52…

MALICIOUS

PDF

93.1 KB Created: 2021-08-17 07:33:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 48a19a6269723057c6cf97106bfc66f7 SHA-1: 8ebdf7b2272cd08100a96be94ba882957df8ba0b SHA-256: 076a9cd350264c52d8d9b8ddbcaac89172a111ac88f872dbd8a81c3a2a3e9b22
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to be a link farm, potentially for SEO manipulation or to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://smidgel.ru/uplcv?utm_term=raja+ki+aayegi+baraat+full+movie+download+720p+filmyzilla PDF link annotation
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76b6d91d9---lujelusila.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210702234447669.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/mavewigotazuvovomemo.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/73482013224.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/98075930662.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/52283695276.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792b62f339e---guzulezu.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/wozopitefilurunazu.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/6605002536.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/zewokonup.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/sonitomifivadinaxosavat.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/83468437420.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/a7kbfoelp2dh1jlgdc3gcden5v/95059958091.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/daae08996c59d95ee5c4ef08af54e3a8/9351315213.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d0895040a---kabezezasetigoxune.pdfIn PDF document text
    • https://digireg.org/upload/beniwe.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/numibulawozipafa.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/46039840862.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f7f1643b---potukizalenotimibugebed.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/d2860e6148782bf6abb0c7fd7e4f26ab/19429293844.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000114dc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x114DC 18964 bytes
SHA-256: 031b86b5ec993d715f4a941cc99375306852229f40f97f65e595a35ea971b29b
font_00_sfnt_off0000e0e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F7 11796 bytes
SHA-256: edee55ed2964a88fe91e38017d28d4825a20d2e1169b4c9f80002983f1c05ebd
font_03_sfnt_off00013343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13343 19256 bytes
SHA-256: 419e4f804e9c2b2ff7f715ad37865a018f5814759c9cb84dae9e985b88a9e798

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