Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c23f5caae2cbb4e…

MALICIOUS

PDF

73.9 KB Created: 2021-09-14 11:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d77202aedea6148e89fa8ac5012e6887 SHA-1: e99e5886afeb9b8b0cd36cd945ccb89937b57de3 SHA-256: 6c23f5caae2cbb4eef5b064ece90cfb12a9cc6d343ff0f60c3f9060aa595bd99
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm designed to redirect users. One URL, 'https://pixomot.ru/uplcv?utm_term=3+ninjas+high+noon+at+mega+mountain+full+movie+123movies', appears to be a lure for potentially pirated content, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=3+ninjas+high+noon+at+mega+mountain+full+movie+123movies PDF link annotation
    • http://laptopcuhaiphong.vn/upload/files/79584908209.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62119088271.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/nalav.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/ninofarowex.pdfIn PDF document text
    • https://himalayanwanderer.com/himalayan/userfiles/files/27622904805.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/62149550826.pdfIn PDF document text
    • https://triptoboloyfoundation.org/editorsfiles/files/74470505772.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/69486489742.pdfIn PDF document text
    • https://borgopitti.it/userfiles/file/palidumilis.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/52352060560.pdfIn PDF document text
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/pakemujikogen.pdfIn PDF document text
    • https://zagi.hr/files/75591896658.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/72865649927.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/falagezudigejefivewiruler.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613e12996f6b5---43230025931.pdfIn PDF document text
    • https://rais.bg/uploads/file/pavemomoda.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/vaxigadivanogefevexejeb.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd8e211f62---badeximemasuxebodufa.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd1943e8f8---kunuvowa.pdfIn PDF document text
    • http://geojeoceanhotel.com/userfiles/file/20210913023355.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/merejo.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ieu7bu898d1r6sl6jtngltuaj1/verivexap.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_off0000bcc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC3 16692 bytes
SHA-256: 2c5a9e5349294db808df549c917d7390609bb60328379ffe9f7590103560ed2b
font_01_sfnt_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFA 11104 bytes
SHA-256: c46133227ac5e604cc7be9be4e25bf3cac0979ee240589ddabdff471eff49b99