Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bcf5f2f1694f567…

MALICIOUS

PDF

91.5 KB Created: 2021-06-30 02:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e43c4da3a901f67d571b1f2e5ac5e023 SHA-1: 1630b95cafd8522026e2746232a1bdfe5269b975 SHA-256: 1bcf5f2f1694f56797a468344a0f0523870550df5fd49871381cbb0f50672051
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs pointing to compromised websites, likely intended to lure users into downloading further malicious content or engaging in phishing activities. The presence of multiple links on disposable hosting and compromised CMS uploads reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/37c51097136d646fc8deff517f5e7e75/jamudaranafemoxujol.pdf In PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608327a95a1bb---wubolaloxozi.pdfIn PDF document text
    • https://actorconseil.com/files/file/saseviwidoxe.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/liwupiw.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/1343296998.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bc3902fbd---jujamurupedumaburobej.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/xurofajedoxadojojij.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/90238294921.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/93449966.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3f3af25ed---72613749775.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/xijasizololibubopofi.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/87656121925.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76lcg6m284k9ae11cvb6absoq3/somulunogosubinitov.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/25750807334.pdfIn PDF document text
    • https://steammining.com/userfiles/file/61320886982.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/ea9c2f9a7180386a4f3f7d50c7d2490c/wuxakidovini.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823a1587808---35341707979.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/5769c0ab87383e4aaa1e699173b400eb/gajowutagadasarifiz.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a68e37d34b0780ff75283ed625370e83/lonevulepalanogofu.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/nojinoveburi.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a92092aa81---gotanonaxerobirexan.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcc9e2a7f2---kujimuxulubanufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=despair+meaning+in+englishPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BB 10484 bytes
SHA-256: 3a0e8d9001a78391ba4358d661315300e6aced550dd343d8222f4e11024727da
font_01_sfnt_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10562 16576 bytes
SHA-256: f0739b8b98f003f6da035e27ea50032e114ab5cc6e19a2a1bc69084d3180dcb6
font_03_sfnt_off00011ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA7 2400 bytes
SHA-256: 37a31d100c9001f641439de8ff4257f22e2231bd3ec43aefb872c128283d6dcd
font_04_sfnt_off000126e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E2 22388 bytes
SHA-256: 1173dbcbf731c7183b09f9891871536c84f4058868e8ceaa21ce34c554ba81e2

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