Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa2e7a860ed9006…

MALICIOUS

PDF

87.1 KB Created: 2021-06-26 21:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 21c094deee6a13cb7ecd23398ed9ea8c SHA-1: e50188078b12108f0db9047f510d1dbcda1e6bd0 SHA-256: caa2e7a860ed9006116f60fc561de9b1dc04abfe9f878c8cd3867547eb59d6fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to distribute further malicious content or phish users. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://hevolta.com/upload/file/70747151840.pdf In PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/3sk2tsptpceoumd13sqtosa9c3/bizemakimoli.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/48877432480.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/99gcgibfo5big8j56odbo09te4/51561427454.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/378dd695da02175afec0abc8d086034f/99473453565.pdfIn PDF document text
    • https://hgb.se/filer/file/23722823363.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/cqvcl6vsj792kgopnthff32t2l/5114297126.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/87821382660.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160928c8094fcb---jabexoguzugedanajitaxewo.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160729dea2603d---xafuvojafupabotosut.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/3e43aca04c7f37d1b5416a82bb35f445/dapob.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/qim0j1a1b782ui8nkbeq5o5014/31881148209.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607246339a955---23852891147.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fe967e1b5---faposonudizurizabet.pdfIn PDF document text
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/50549599569.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/11elsl90ao8dqe3rnq6hil3pig/56736264120.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ol93dsbm232io3ki2tvt3pg944/miwupujibilijefudoweweke.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/27luk6o7oi7dgtb2kog6731a54/bagozolerapomixan.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/86846658561.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/dekuzurixu.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/48696232080.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/vgpnhisc132rqmbo49e5spjpcf/wuxina.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/kibafemavojevawikirajuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=biblical+meaning+of+400PDF link annotation
    • 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_off0000f1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 10708 bytes
SHA-256: 79625ee2df901ae101177edef48e1d7ff9f95643a350e6e47a63a8085e6bad2c
font_02_sfnt_off000122a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A0 17048 bytes
SHA-256: 08a1d4d6678f67927743d8ddee4f24accbf7428baeb3dc70384a6db2edeeb5ab

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