Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9267b267a7ac67…

MALICIOUS

PDF

94.1 KB Created: 2021-09-07 09:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ec82fc35e79dfcda73bca6ba26acde15 SHA-1: 2cb3fdfc9c6433670fd6a52a25c087a3187cd9de SHA-256: 2a9267b267a7ac67d206c6d7bae303bec6ca14de1256eeaa0c832625eaae57be
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs are consistent with attempts to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://oniceh.ru/uplcv?utm_term=rosary+in+latin+pdf PDF link annotation
    • https://gruppopolidori.com/upload/image/file/bujipafo.pdfIn PDF document text
    • http://hodori247.com/uploads/files/7915439071.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/putatobotoxugage.pdfIn PDF document text
    • https://universitecentrale.net/uploads/FCK_files/file/marozomekujedu.pdfIn PDF document text
    • http://rmgoals.com/userfiles/files/powaja.pdfIn PDF document text
    • http://sb-78.ru/files/file/roleta.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/sisunebenaganawafeje.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/bisir.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/nixeperokutopojotuwo.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/17872901096.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/wivemosusuguvapobakur.pdfIn PDF document text
    • http://congtyvima.com/images/Download/nadegukuwagiwuwuvolebele.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/6epi0l2qb04dlts30t6e2n10j5/1960289942.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/21673350281.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/xuwifopisesolilifuvajefa.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/1459066068.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f37d504da---67262627034.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/1696844001.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/56752596161.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/93fc03ab78a68be5c86019dfa3d00918/87396609784.pdfIn PDF document text
    • http://osmed.cz/app/webroot/files/files/togifipol.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070d3398bb64---50270871005.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/866d611a2dbb8de4389190d72b33a461/93399851704.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e93c2b61e90---satujuwufu.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_off00010844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10844 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001205b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205B 10516 bytes
SHA-256: fbbdce7a1a9c6438fdd11ebfceddb745e1c939a985507b85c5e2f8a2cdb5c0f7
font_02_sfnt_off0001386a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386A 19512 bytes
SHA-256: ca86ddd73589fad7af3d5f2ff8845acd98d37078d32cecc80f939e19950b5054

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