Malicious PDF — malware analysis report

Static analysis result for SHA-256 980898ad08034a81…

MALICIOUS

PDF

82.4 KB Created: 2021-09-05 19:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7024b9114cfd63e4d81f1eedbdf1821a SHA-1: 8443028a8b2d49508c73465cb2c6de122f275617 SHA-256: 980898ad08034a811f2832d0af07ea2b108bba35baa3c281068b2a1518902b98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or scam campaign. The embedded URLs and the PDF's structure indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=manual+citroen+c4+pallas+2011+pdf PDF link annotation
    • http://yesilderecine.com/admin/editor_resim/file/56148798257.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/sifidajumagawemibi.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d6f4b03e2---xuvizevogesupojavo.pdfIn PDF document text
    • http://capitaldanceacademy.com/userfiles/files/mapoko.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/8iv873vimvml5n0fq4r3q8g39s/gajasamugorugiliparuwas.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/9763868605.pdfIn PDF document text
    • https://argekaucuk.com/nbg/upload/files/42831834672.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/34432535903.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f64bcc3c356---tavutoguvovevi.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/20433018002.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/81543506843.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/zuziso.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/19409213019.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/542df558317d586c922da1a566b2d7a2/bekerubimu.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/57543637694.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/5fb9e49a4bf6d42cf9436249625f8aad/xovekemolanaxedawixiroxoj.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/df5ba9d73f82a6a9ee79d427e0a1f747/wafitigirixe.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/govisidojoriwavopafuxopi.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1aee51664---47697479797.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160730dd139adf---levepax.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b64decba9bc---18872334346.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/rogipireberulebun.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/3787a240d80ff48ace1ee6b944a664fd/bovoganiveliziwefonuzapus.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_off0000d8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 18832 bytes
SHA-256: c61f782caaf086cc38d01732b0932ef3b4cc3fdaa82e54a74238a39723787a3d
font_01_sfnt_off000109ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E5 11076 bytes
SHA-256: 3c74b4d01737d951c77b2012e8cb8e7603d463fe0f12b57203542a33056b78e7

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