Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0a3334f04faf31…

MALICIOUS

PDF

86.1 KB Created: 2021-06-30 05:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d7c7abf7ef5eb564bb21f1a1eb2d3a75 SHA-1: 5b84e4ac2f367b007821fa13ab2f2cacd3da969c SHA-256: cc0a3334f04faf31d226b58acebcc0532dbbc2fc2abab823860327e96b304ffc
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, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://krisoc.ru/uplcv?utm_term=manners+makes+a+man+perfect PDF link annotation
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7rfojnvm21hvre8djnjb3a77ve/joxobijirinopejaser.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d000356c33---petudag.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/6951846185eec3da80563f8c59ef2bb0/nutabexenorunozam.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/641acd54233f8cf76f26b73bc711b5a3/tupukowuvo.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/sumalexoxuw.pdfIn PDF document text
    • https://irrisyst.eu/files/file/14293466207.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/94811569353.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/kloadngkkkrrem8algjsrb7d12/sugameriwuvebudoviwene.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb20d41cd3d---xobirul.pdfIn PDF document text
    • https://andrejc.si/files/file/5377809388.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/5542a21d42b287f4ef28b86938c70c67/92865939097.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160742b5d4f32c---puzomeroliganebekobeb.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/zebevorilizukibasiru.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/86583002667.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/poretagivesutefamomo.pdfIn PDF document text
    • https://melz-feu.ru/upload/84555390187.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/10315457930.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cba7c2b0c---98712657780.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/a31c410acfaa54c5b601e43a113cd926/vumojigodatoxofadojuva.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/d0871f2308fbf1d530016f0cce133d4b/donawoviketiliputazira.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kudixosulimefaruso.pdfIn PDF document text
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/9198961387.pdfIn PDF document text
    • http://upbfassadenbau.com/upload/file/pigudato.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_off0000efa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA5 17076 bytes
SHA-256: c8920cb39515f5a6647e3b389b0d57d0704990504d9350aa4a7005d71704afb0
font_01_sfnt_off00011bb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB2 10468 bytes
SHA-256: 4a04713c56908b80483572dc184643e967e0a7e63383c9ea1541c1cdeaf6bc78
font_02_sfnt_off0001337f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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