Malicious PDF — malware analysis report

Static analysis result for SHA-256 26279eda52875713…

MALICIOUS

PDF

84.9 KB Created: 2021-09-01 22:18:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 052967ce3e313fc1d698137db4adcc59 SHA-1: 8bd8cc6a6af2c5211be8f8d6fc906ae4c94152b8 SHA-256: 26279eda52875713fec28816f40f71ac4e4438f8a050cf9e58f709a51c950279
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress sites, acting as a link farm. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://nomylo.ru/uplcv?utm_term=plural+form+of+echo PDF link annotation
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b854783ea5---firusode.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/files/16772543222.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/15238790268.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/672fbac18162cb663745f118c1056847/52029816559.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/ce2baf5763f17149460bed383579e513/68404111297.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/vejaxatuvav.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/iogufp7jcrb7cim2u0u4j15td6/49271196424.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/jiregixepepitafagavopenat.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/9df1c9d76c2889bb9d1618eb26ad8314/bamokujisezonefibotawut.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/20467716765.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/bevivivugonob.pdfIn PDF document text
    • http://esistore.com/userfiles/file/jeterebifowunoxerajizur.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee8ec00b9f---85579684954.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/zuxesejutig.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a281634b4db---sorarojuni.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/7724880423.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/78e7023d8300a999e9600aabed88464b/juzano.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/pumijofogifonitisanirobox.pdfIn PDF document text
    • https://nilsagame.com/calisma2/files/uploads/3098380060.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071ee19ad51e---pefixarade.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/79434352479.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/tilunipiwikuz.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3330512eb---88686753102.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/964599c3850c921ff7c30c03962eaf6f/12543887009.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_off0000e157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE157 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96E 10240 bytes
SHA-256: 0b51fe296941ffad4b08ca74049f0c867cd1a9c88fefdde3a8c7c369a4f1b6bc
font_02_sfnt_off0001106d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1106D 20164 bytes
SHA-256: 3edd222a5c2c3eafb0dcf851c4cc61b2dd43d8fadec006697e5f1e59c6c0b34c

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