Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e8d9dce27362b0…

MALICIOUS

PDF

87.0 KB Created: 2021-07-14 00:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 29ccc2baf9abae36161fb4476077e540 SHA-1: 61f1a433dab92221be67e08d0828d19b5b684e59 SHA-256: 62e8d9dce27362b092c2c54b29b1cb0833d0bd017c553fc0c0af94f0e2aff79d
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, a common tactic for hosting malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery. The document body is unreadable, but the heuristics and URLs suggest a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56f893d758---pozeruzebodevirofikikuf.pdf In PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bd3a09841---76555993518.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/h6s9jrat8u72b7oie0rkc2plt7/97047283439.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3814a0dea---dowuxen.pdfIn PDF document text
    • https://abeess.com/userfiles/file/53275006676.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/xogawuvobomapolun.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c29d6be8ae6---72947934974.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ce144accc6c---86029887552.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4caa91ab042a14ec48d84afd14eca865/12364880703.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/43265559237.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/22787910869.pdfIn PDF document text
    • https://petikdaun.com/contents//files/90089460637.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fea3781fb2---rarifaxusaji.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/xelopizigutitobuzenigaf.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/81744536599.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/rokaxasorosul.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/gid3q7k7tu0eopm1bqr54uf3m2/98401364916.pdfIn PDF document text
    • https://toromecanicorodeo.com/files/kimidifexuzeg.pdfIn PDF document text
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/92390233549.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef39163a3---47639341737.pdfIn PDF document text
    • https://laflammerouge.ch/userfiles/files/xasisozutesevefixoni.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/52193159188.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/bumaxuxowa.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609242b554489---40984525685.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=yoga+with+adriene+complete+beginnersPDF 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_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 17572 bytes
SHA-256: ec386288a56db1b6b79183f29a2b8ec966f35ec10cc3ac62de9901a4925dbc77
font_01_sfnt_off00011b03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B03 11172 bytes
SHA-256: b44da3d1dea4063ab8b24f4d331be7b54fe69f4fea70dcdd45edaec34e9fe3a1
font_02_sfnt_off0001348e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1