Malicious PDF — malware analysis report

Static analysis result for SHA-256 567ca660ae829364…

MALICIOUS

PDF

99.8 KB Created: 2021-08-20 02:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5cb5b9b723e6f45dc7ef9a91a9e48736 SHA-1: bf77d2e5940cc9320784c8bb26b8e2703157b11d SHA-256: 567ca660ae829364933786968c2c18f0f67c669c7adc99ba264538f289b868cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the embedded URLs and the heuristic firings point to a malicious document, potentially delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://huntic.ru/uplcv?utm_term=what+is+the+main+objective+of+an+organization PDF link annotation
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084b2da1b962---kafudeze.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/g53f8kns3b5mp902rgr7t56uri/wokupasuporakejudo.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/84287618102.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/i318bpfhi19c12pehodg6jav2k/55813278433.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/pazarajepegopadaxobava.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/cb087abaae6f20cdf360ed2c10a87062/15895238825.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160869c2e6ef1c---87560933099.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/xejukozekoduxalosiram.pdfIn PDF document text
    • http://metapolar.hu/tmp/54967958149.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/27379026362.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b62db490b55---detirogeputafabere.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/ote3uifnj8g0c4tg0liasn04ng/6159622963.pdfIn PDF document text
    • http://bctlorraine.org//userfiles/file/xejubogabisaxetakefasew.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d54eb85e---35312876057.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/gesapuvinebes.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/c0cbfa0bde58d2db22dd9b798c8723bd/sikobosaregitusetajujekab.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a364a431b39---punomiluretu.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202186751335202.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/1376608389.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/valalijaseritazetura.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/dfb389c1c980eacf577858e119ab805c/97094879766.pdfIn PDF document text
    • https://forthepeoplegov.com/userfiles/file/bonugunegud.pdfIn PDF document text
    • https://susta.vn/userfiles/file/dimekaxasaveduludegikoj.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7cbf7b630---bonavuveronomosowigeb.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_off000122bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122BC 11128 bytes
SHA-256: ac0767d8fb2b1e581885a99f3115127cf3dac6d86e9561f18d862fd68db48ac2
font_01_sfnt_off00013c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C96 17488 bytes
SHA-256: d7fa422cb52cff9d4730600b511abedba99a455ef9b61d04f4593c9027dd431e
font_02_sfnt_off000168da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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