Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2285e1733124cc…

MALICIOUS

PDF

77.1 KB Created: 2021-08-31 16:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1cda2b41b2176db11c3f185265119209 SHA-1: 8d09139a421f7cea772603f3423ee921980dc798 SHA-256: 3c2285e1733124cc17172e21b936ca7b944c92e62d71071415950630b8d31d69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised CMS upload storage or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL analysis point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://world-green-hope.com/uploads/files/16723868377.pdf In PDF document text
    • http://nedirajtebosnu.net/userfiles/file/lubuzemibazevini.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/ginizabufusumagu.pdfIn PDF document text
    • http://greer2001.com/clients/e/ea/ea56749d84c1a2d7db36d2c51c833a37/File/45177907354.pdfIn PDF document text
    • http://everestlodgelukla.com/userfiles/file/goraloloxuzoguw.pdfIn PDF document text
    • http://allasclub.com/campannas/file/goripuroxezale.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/gofuboxo.pdfIn PDF document text
    • http://www.moyekolodin.com/files/zuzalobil.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/15/file/20210515_215810_103.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/kovazasuronex.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/678a70e01f719a95ebd5bb36572fda64/motogipexiladimiwiwudured.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/babererujobeg.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608441b437dbd---sulafojavuligux.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/jezigamosuvamawi.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/85442839603.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/26459340057.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/dolazaru.pdfIn PDF document text
    • https://suprastoc.ro/userfiles/file/rudam.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/a3823629c670f59787624589b341ad2e/pizidipi.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160725db8a0a15---78359043321.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/pivinub.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/d377559e7e2e62eaa6d444e0fa094da3/wurumatapodedibumifexaki.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1612a33eb9b3b7---85208651391.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/poxewewadigobadubapi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=rods+in+the+eye+are+responsible+forPDF 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_off0000cc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC98 10896 bytes
SHA-256: ab525f154ac39b70d746d51c24d52f4c2dbac4c7e6415ddfb94794a5aaf76b2c
font_01_sfnt_off0000e57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57D 15828 bytes
SHA-256: f55c97d52679e4194077cde2a64bf5fc2d93af9336792c8a9ce3073c5724ae08
font_02_sfnt_off00010d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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