Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f008ef5fb01902a…

MALICIOUS

PDF

76.5 KB Created: 2021-09-13 22:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1dff82ecc0a3550ed7efdee9895c698b SHA-1: 221d79274360ba7be87f74b5edecdcf2eef41d18 SHA-256: 2f008ef5fb01902a591bb64dc8377f8bfa5ccaef5a9601491c63dc9a29144a41
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://philabc.ru/uplcv?utm_term=alice+in+wonderland+text+pdf PDF link annotation
    • http://dragoniresorts.com/userfiles/4314393223.pdfIn PDF document text
    • http://skupka54.ru/upload/m/mataga.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/42376334312.pdfIn PDF document text
    • http://epmachine.ru/d/files/76700572883.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/mmignseuikkfsp3jptf46jb3l1/gezoxujopifil.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/41755064486.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c59a901fff---jamagakaw.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/xexugojilizoxovegarud.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/44442692467.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/75109260864.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613751367ac48---36590415908.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/79240039901.pdfIn PDF document text
    • http://inica.org/files/file///lezazikilejetak.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/gubuzosesalora.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/53314477154.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/javakadusiputod.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161390938d3a12---tikaputa.pdfIn PDF document text
    • http://astprom.ru/sites/default/files/file/disusubezed.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/sugiwonupajekugowiretove.pdfIn PDF document text
    • http://dytac.hk/userfiles/27021372344.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f272b2eaf---19857778745.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eacffea6eb---87624066873.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/21359195104.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_off0000c803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC803 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 17000 bytes
SHA-256: 27d4eded0f0b05612863427d01ebf0ae62247fb6851b17ea24db56c45bdfc2de
font_02_sfnt_off00010bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC3 10612 bytes
SHA-256: f409d2291402a9a22135288ef2c125e1e59844c19661222ab6391dbf92dfd06f