Malicious PDF — malware analysis report

Static analysis result for SHA-256 4058e9e192c54c58…

MALICIOUS

PDF

94.2 KB Created: 2021-07-19 00:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4384c4c6271cb2ac453dd9be6ab461fb SHA-1: 07a926d767df78fc65a071b7cf52d8e135381ce1 SHA-256: 4058e9e192c54c58ede913b1cd22be3650a7548302c7b3e482ea4f97b88455dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://fdscience.com/UPFILE/userfiles/files/33634150323.pdf In PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608478efadd2a---67347997964.pdfIn PDF document text
    • http://imaginove.eu/data/Files/lixobuvokovubid.pdfIn PDF document text
    • http://resheto.ru/users_images//fck/file/jipasoribemubi.pdfIn PDF document text
    • http://www.truca-taoules.com//ckfinder/userfiles/files/tafumesuvewipewepeg.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6d99dde48---37303909762.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210707_E141723A021708D0.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ebf52ab95---zutipibosadifemaxo.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/3d27c01cad4afbf029f09e9b6fd265eb/rapomedov.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/5d0a6ppk0246fggbn7h8nsn790/vusanasibibebegu.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/47hc1eog875of3br85hos436g5/segip.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/sarajupoduderudirobobefe.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/latofazowowefujibuvavi.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d02b8a8f15---19109883726.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/dazakiguxug.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5de71c5fc---98124009450.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999c0609ad2---32695297579.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/33f9m54br7d7oqij9ikgkipet8/nakamujapivipigedagibetij.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b67bcf1f478---boxanovigelojijojukum.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2050cd2538---45494045340.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/64069627393.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/revemiregivuzotanarinuj.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ac184e836d5---bitaduxipojidapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+circular+text+in+photoshopPDF 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_off000108fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FC 10752 bytes
SHA-256: bcdee6d1667194f2eea5925168296389097b51917d23d16200f9fe87a734db9f
font_01_sfnt_off000121ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AC 19616 bytes
SHA-256: 50f69e3ca94180ea95aa3ed3b3c18807dacaf47f1d28ffbdeea18b3d6984bdb7
font_02_sfnt_off000153b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.