Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddd1ba0ae68ed96…

MALICIOUS

PDF

89.4 KB Created: 2021-09-04 07:48:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d699f155bb485596831671ccf821d392 SHA-1: 3f9fabf40394a3735563732841d575d596c035ad SHA-256: 6ddd1ba0ae68ed96a5aa7e468f46650984844f36a3bf1c86dbbd516b9f19392f
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. Numerous heuristics identified the document as a link farm, pointing to compromised CMS uploads and disposable hosting, with URLs containing 'utm_term' parameters suggesting SEO manipulation for malicious purposes. The primary attack pattern involves directing users to external, potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=political+economic+theory+pdf PDF link annotation
    • http://aiaato.com/FileData/ckfinder/files/20210607_0AADB867DDCFB6D5.pdfIn PDF document text
    • http://twilaw.com/files/files/gebag.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/o26hmjc3hcka5h6b02tuorenvj/86715043082.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/16492443128.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/nilamelefobibugekixukaxin.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/43683579819.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/27043869335.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/bb41d0f9ba67b07b78e75eac4855796b/38162559253.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/t1qpeqnkk1v3t1retq7tafp2a0/77850707037.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f630c104ad---71961112005.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/98a587c836269a4e13558be1026538b1/95620271233.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/wuvewesumixigos.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/69145347416.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/28592276738.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/wisezisilaneza.pdfIn PDF document text
    • https://avflash.nl/upload/files/tojizubojokatulowemewod.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/mawamobunarodovetafufixus.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160afa921c6f55---15957979294.pdfPDF link annotation
    • https://hizlipin.com/calisma2/files/uploads/71054116500.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160789cf47c794---loranebupik.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/28405542985.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/fatuwimojedojepevidewuw.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/60jvrl68hvkd3tlu4dvhkcl0u1/lopaneluzakesavad.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/45eee32f4f61abbce04c9d5c7d6d02dc/54340819161.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_off0000f668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF668 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 18908 bytes
SHA-256: dbe15b5c25e62aa79988950b15add667b7be6fbbf8021df95ea2ae9cba2fface
font_02_sfnt_off00013f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F39 10832 bytes
SHA-256: 8317101050a47283605237dd3a0d338ab01d7123e3f3e88118fab1e8fb35d710