Malicious PDF — malware analysis report

Static analysis result for SHA-256 47988d24bc960736…

MALICIOUS

PDF

110.5 KB Created: 2021-07-04 16:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 33509a7a0b42bd33c677ad4c43535ff2 SHA-1: bfc828c8a2b5e59158e4acf99c1388a98070b198 SHA-256: 47988d24bc9607368ce65b510100c4fed9bc74ed1bbeba8e0b45b59d73fa3b91
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious sites. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://nomylo.ru/uplcv?utm_term=english+idioms+with+chinese+meaning PDF link annotation
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091af2a1afc4---56454897990.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/b3d84c4581acf8b750ce794165793bae/95738831337.pdfIn PDF document text
    • http://parkettes.org/clients/b/b3/b30d687fb0e6fb0c44210170e51784d9/File/manopudup.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c3c6df32228---dowapes.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7a6c5bc8e---61380648031.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/87388243748.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/e0299b7127bd4bba3b269d94a3c6788c/94477498951.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/somokuzuri.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c503b7680c---wifokobuvolazimav.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/99792470517.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/3d8dc118a1f9c690c41e3ee48f7d3811/53783229369.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/57819355608.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aadaa200350---gubivo.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/2775694552.pdfIn PDF document text
    • http://fluidearthconcrete.com/userfiles/file/88453313731.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe00353edf---46063293557.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/13877538443.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160706e6d7a74b---3423770790.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a639736be2---jozuwex.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607578c70086e---tujakujuvetafewajudoxog.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/kabisa.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16097d3a8e69b9---95709498239.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f17d5fb17---terinarawupubegiwusolam.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c39b2d8e087---21666990881.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021043022082028.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF672 19976 bytes
SHA-256: acddb555b67ef40f4ac9d5a7ba8af351a716e65bb4541c2a8de3a46e67834d6d
font_01_sfnt_off00012759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12759 10784 bytes
SHA-256: d358c1482c7dff908a6b72b10f2be37402de6656311193179e827f14fb8dde85
font_02_sfnt_off00013fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCF 21244 bytes
SHA-256: 394f7f4fec7d3b226a55935ef7e6f3c589c9cc3825bcba1817714b1267513edc
font_03_sfnt_off00017d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D9D 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_04_sfnt_off000193a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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