Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1e64752881154f…

MALICIOUS

PDF

85.8 KB Created: 2021-09-05 09:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7e324fcf36bbc456d33b770ca17a2f89 SHA-1: c40be1f773fbf0658417ae24611f9d5a26c9a920 SHA-256: 5a1e64752881154fe85214be1069036c21acb5754d72826fc1972f96578cb95d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://infrive.ru/uplcv?utm_term=free+math+worksheets+multi+step+equations PDF link annotation
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbe12a528---27851040858.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/74992665361.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/1b971cfc79a976123d7dd7fcd1edd361/88208012174.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9d604a6d6fd52c41a39944613820b42a/70015527411.pdfIn PDF document text
    • http://washchienluoc.com/upload/file/89414230250.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/fovulurogupevejapeti.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/90148976639.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac58a84cbd7---22684351466.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa21b78abe---fofilomajozij.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/35650891345.pdfIn PDF document text
    • http://hillsdale66ersreunion.com/clients/c/c6/c679c52642bc64dd8629b98fb95ccc77/File/20775122154.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160718ba188ca2---37898925008.pdfIn PDF document text
    • http://langyupharm.com/upload/files/45730172357.pdfIn PDF document text
    • http://roocenter.ru/upload/file/68755195175.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c66e04bfa3---jatisawada.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/mifafijutesatojojaged.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607f621f1bba6---wumit.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/xidamuzimilulogunos.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/kerisedanizuzuwe.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8ea6f14d1---vifumiselik.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/3f0d1876ec5610cd27db32b77b5364e2/55231957393.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/49qha2get1f9tv6lil3i75if83/bopizigasiwonumatororub.pdfIn PDF document text
    • http://ybshajiang.com/userfiles/file/2021-09-04/210904121342922676bgf621cxh5py.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_off0000e75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75A 18544 bytes
SHA-256: 971e0acc7bf5bdeac977a1299f9f66d74a8bd5f6d9c2865ea1e610fa8af81843
font_01_sfnt_off00011821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11821 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13038 10916 bytes
SHA-256: 7beabac55b57ba8698ed7523c43a4aa1c6c0a08049b2178db98ec8e2f359babc

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