Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e201a2362001ccf…

MALICIOUS

PDF

73.1 KB Created: 2021-08-21 20:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d007ae0aa8f867994bcfa1888a5f34c8 SHA-1: 1b7de575cf5078ea344b7b13de8d3b474deadf66 SHA-256: 8e201a2362001ccff75398b33bbd29a21da7075091f7dc6b4dec8dd1ebdb583c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple external URLs, with several hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL reputation suggest a malicious document.

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 http://humanitool.ru/userfiles/file/pakagosof.pdf In PDF document text
    • https://maintogelonline.info/contents//files/83476047350.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/0pvhsc1fukfer8v67ipt7v36pr/mopugezakukivalefopum.pdfIn PDF document text
    • https://masukpt2.com/contents//files/siziguno.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/7b34uadl0jv7taf6hg5nc6kllv/73878094832.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/75090589581.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607224ae55023---vasisodifawofudatimani.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/bivame.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e327404807---vajiledudurusedifob.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/41290843d7db94feccc0705f16d0f040/19464630644.pdfIn PDF document text
    • https://jobtiara.com/files/files/sarubiledarajaserabeme.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082eeb638fae---2931647852.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202107070512394159.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///42182365250.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/waler.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796f6f7cbd4---bogavoneretesosizib.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/nuzarusumidopesadazenuluz.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a4457e37608---37699109396.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/novupuvadap.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/tuwalezeguxamekitilin.pdfIn PDF document text
    • http://cathayred-csr.com/img-cathay/files/71039581985.pdfIn PDF document text
    • https://greenline.bg/userfiles/file/mimunizomagabezore.pdfIn PDF document text
    • http://effektfilm.de/files/file/22291723073.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=frogs+fleas+and+painted+cubes+investigation+1.2+answersPDF link annotation
    • 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_off0000ba32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD244 15976 bytes
SHA-256: 3a4a53af08f0da6874c0912046a4832cb18e85224bc050de3d137dfffa481bca
font_02_sfnt_off0000fb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB63 11404 bytes
SHA-256: 41903ffde58767e1ed37174f107dac9baf8e19e2a08315e60ad14c5cca58a01f

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