Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ccfb02d2cd6d82f…

MALICIOUS

PDF

95.1 KB Created: 2021-08-01 18:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a8162dab5dd31591eef4067ad4aa210 SHA-1: c615cf29da407508b7e89932afad74aeaa9e63ea SHA-256: 4ccfb02d2cd6d82f7bda6da114a0b2bf5561c6808db2677ec5346062ab885697
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to leverage external resources for malware delivery or phishing.

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 http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0824945e7---10264435913.pdf
    • http://staractivecollection.com/resimler/site/files/85648451563.pdf
    • http://darec.sk/files/files/geguvejadaketezuwijidemob.pdf
    • http://vaonhaphatphap.com/images/uploads/files/84011038928.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2fd5492db0---gutopixa.pdf
    • http://beamstraffic.ae/amb/userfiles/file/vinate.pdf
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/c223e6eb80766e2a26f17abec185b925/rifadofo.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160db9423784a7---40620501874.pdf
    • https://theatresaucinema.fr/uploads/file/sirufobebame.pdf
    • http://a-kamen.com/userfiles/file/bujuliwekonukixexonijidim.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4eaca488ed---53782915869.pdf
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/judubevegexofug.pdf
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/jesowag.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1c9e31e09---62185326372.pdf
    • https://gelblighting.com/userfiles/files/tikegojanatukinaw.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/f66c56acc2db3b3f593517e44a7b402d/sudutetazanukidezezepurus.pdf
    • http://clickvay.com/upload/files/fiwetaporafifisawosolazut.pdf
    • http://2990592.ru/ckfinder/userfiles/files/60896471399.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16074c067e28b3---lojojakoviretudadetu.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/7p96590l2vg9283306ubs72534/lavevuvagunotiwadow.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/6brql3mqt4taud3ca3an1qgo3j/66345189260.pdf
    • https://duproject.com/uploadEditor/files/8742779427.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/0753b9c204ee752ad8c88da9089d29c8/mutoxezatorexularelip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=antiguo+ritual+de+exorcismo+pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/03cbdaab4fde91d48dcaf099fab287ca/wutibefivikikefa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e4.bin
1446b4a38524d049393da4323c29a433970b0a2fbd3b00a720f559f2ccd779d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E4 20468 bytes
font_01_sfnt_off00013c69.bin
a5364a38f41510e80fcaae511cb043f4c82b8cb7416ff33994d1270bd17db3db
pdf-font-stream PDF embedded font (sfnt) at offset 0x13C69 11148 bytes
font_02_sfnt_off00015647.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15647 16792 bytes