Malicious PDF — malware analysis report

Static analysis result for SHA-256 318a3e22070e30e4…

MALICIOUS

PDF

109.2 KB Created: 2021-08-23 11:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 74241717284a1cbb1eb7918311e2b815 SHA-1: cfc2aef91200ee066b165fe86819dd78436c7f5d SHA-256: 318a3e22070e30e44b39a5f2af0ca24e57f02203ab79cb8f13dbd323823f6646
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://pistant.ru/uplcv?utm_term=interference+of+light+is+evidence+supporting PDF link annotation
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/54f74351c8d31de6c65e82e07307ed8e/kafuvopowedomalenegawe.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/rukuwuvipumajiban.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/kogutejerumubakiti.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/karab.pdfIn PDF document text
    • http://delve-cr.com/uploads/34267267839.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609de1e304035---kobafozonanodiv.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1078ce8494---60848802199.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d08c9c8199f---rukizakevox.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adf3a81780d---guganijivalajakavu.pdfIn PDF document text
    • http://ccsl.asia/files/gifuzo.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/70edc8ab7009be2a463f34199363eb6e/77596290465.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/0e4ce23a122b6d758b905923b4361d86/94014633824.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160e24a0f2abfb---vemajowuripufoterivumuw.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/merajojutuke.pdfIn PDF document text
    • http://styropapex.pl/userfiles/file/xebopogufejozufanazop.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160bca3e61ad5e---poseluguguxebojiro.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/t8hi0km5odd11tsomj2fgfes2v/9246070214.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/h3hg508r5nqn3ihnng56n4lhl3/xigasizozepasofikonaf.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210722234132.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/75911841932.pdfIn PDF document text
    • http://emannsltd.com/userfiles/pipivutiba.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f411c914d---5742953927.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/fuzalaxanupagasumazudavi.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bce38a3a2d---38176560441.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8c06a673f---jafob.pdfIn PDF document text
    • https://coaching-jk-academic.com/ckfinder/userfiles/files/82502931459.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_off00013e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9C 10852 bytes
SHA-256: 30eff72f5cacbf6f0346b4eda4c53804668d21246f4472b10b86179932ab4769
font_01_sfnt_off00015766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15766 20576 bytes
SHA-256: b5c9cc659194b384cca9374a07921621de0c69d66c8691305aa0dd2610b617f3
font_02_sfnt_off00018dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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