Malicious PDF — malware analysis report

Static analysis result for SHA-256 97800e7e119f5c72…

MALICIOUS

PDF

86.4 KB Created: 2021-06-25 22:06:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8c20e260a25ff21808cc604a604ce72 SHA-1: c79f36a4f609491a4f0790dc7efa8d99daacd175 SHA-256: 97800e7e119f5c72d381e38dfc35f71c23fa34759d5ad97c045f6bb20a73bb2e
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via these links. The document body is unreadable, but the heuristic firings clearly show a link farm pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://esoftland.com/userfiles/file/14791102541.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3dbf2a66b---58657509244.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160832fc7992b3---4012761450.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e24b11b4be1e008f2feec8e582d222ed/bexoxivizexadaxotisowepos.pdf
    • http://nguyenthaotech.com/upload/files/pobuvenubisebome.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c8a9b41aa---zavesunamojanepajik.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/5gpku32e62cd23ujvu9pect13i/fizugunewaxomezogun.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/5db271cbed0b13c52df8db55cb31960e/65467088120.pdf
    • http://kangs78.com/clients/66216/File/tizikejoj.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/08e5efef27827113f996c7fc4996fca4/nivoterokesi.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/6iv6g0ue0b088rrak6fnfnfe5p/mewevasawijedilaf.pdf
    • http://zwickerfoto.hu/_user/file/zumabofelogupesojuw.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/2d29478bc00220196f4f36401dc18565/47608702792.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8c6a54a2f0332748bc3e491f5ca45058/duzonunawiki.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609631ac9416e---44599219947.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160909a3c36ef1---misuguwasufodowokusu.pdf
    • https://firsatpin.com/calisma2/files/uploads/mabenorad.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/1d91ab97508f7d369c31c39fb892f731/midevodezo.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160957873a74a9---norud.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/a65820e081c76147de7456a5c17b5983/61633711099.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae19aabf659---63141926963.pdf
    • http://forglass.sk/userfiles/file/76825234306.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f9a25475c---69865065770.pdf
    • https://btegypt.comfile/pagasek.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+good+witch%27s+gift+full+movie+123movies
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec8b.bin
6cc21adda3cde969449cbaf77e9f9b637e2d86d68b125883dcb1d1c7679aeaca
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8B 17200 bytes
font_01_sfnt_off000119c3.bin
45e88246c1448d32f24451a90e95cc67f0820c80dcf0ae44441e2ea379efaf39
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C3 11152 bytes
font_02_sfnt_off000133e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133E0 16792 bytes