Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3554712b11b62a4…

MALICIOUS

PDF

84.6 KB Created: 2021-06-29 19:14:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 24ea47deb53f3861736d4f85cf054bed SHA-1: f36e76c373958420fdca88593debc5cb9650f487 SHA-256: d3554712b11b62a481f4c9fddf726c4704a6dde565c27f5717355d965f6e795a
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://drafthe.ru/uplcv?utm_term=yeah+you+really+got+me+going
    • https://malashealthcare.com/userfiles/files/60644071969.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fda90abcc0---dirobufujupujavewidedaga.pdf
    • http://jarosi.hu/files/file/91966447001.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73723921f0---pibebosaxorilitumivukop.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9693c29010---93033826282.pdf
    • http://arisutour.com/ckupload/files/27925569851.pdf
    • https://arte-salon.ru/upload_picture/17961550268.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ivtk5v1pl8n602kjd5404k8vc0/sazulajazemepik.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/b15e2dd71c2133afc522a1fbe6b0ec41/zotijabedapu.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070360de00cc---garonalurisetajegef.pdf
    • http://winso.tw/userfiles/file/76534718088.pdf
    • http://aitrans.cn/UploadFile/file/F1202106241909175229.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/0jn4s744c4scd2fij90v4lt4g2/kipixerusirupadoro.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c12b6b43db---todavekafuxesupibuwe.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838323be9e3---zukokaburewog.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/cdcaeec0da03129c1eba356b17abe329/vipuwevowebiloj.pdf
    • http://salinahighschool1968.com/clients/3/33/33fcb9b832a528c934b1ac42c6b88a99/File/95220131305.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/284bbab42c4adbc89ee48b301c63e2c9/soguvenomesezaxuvibarob.pdf
    • http://e-sportis.com/images/upload/74064555255.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a9554840543---46162878383.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160af20567c3a7---68171295435.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b783de324bb---morarubigunekipozobese.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_off0000e6c9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 16792 bytes
font_01_sfnt_off0000fee0.bin
ea0201078de42f7f42b8f74539a762ddaa837f6ce3e05627f1612d593143aafa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 10584 bytes
font_02_sfnt_off000116d1.bin
d74c3955b4feb7a310ce625ecc768a2ca301ca14e35d5a167683fcc78397ba49
pdf-font-stream PDF embedded font (sfnt) at offset 0x116D1 17164 bytes