Malicious PDF — malware analysis report

Static analysis result for SHA-256 4add1afb94711b51…

MALICIOUS

PDF

99.4 KB Created: 2021-06-09 21:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5d63e2da7e562edd2b91e128f83781ff SHA-1: eaaed2c8680e2706b0d284c0e6a92fc2388a0f7b SHA-256: 4add1afb94711b51c4c9d3306ca46093b6f26140cb72e6bc7a436ce52cf2251b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. These URLs are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://infrive.ru/uplcv?utm_term=raid+relic+keeper+masteries PDF link annotation
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/e0d733d57d8d732d856cb402f48e0aa7/61930090571.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/delumifov.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba92010307c---39135372528.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d80a9da368---82637675437.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/zazobok.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/o1g210h9paj51cq51crrc8csjj/jowuxapuginojoxuza.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/kmeucd4rlmc3eec8vqlsl5gog4/zanesavifabilab.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/pixojebinexibobub.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/3b42b6db190c55c298dd51f8fe90f4c1/velowa.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075159b4475b---xaleluresepoponani.pdfIn PDF document text
    • http://ahchala.com/img/file/novuwododuvitenotibez.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077646ef4235---bofepigaram.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/62193747685.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607374889c6bd---74022227095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000148de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148DE 5288 bytes
SHA-256: c5268df0307ad90060a521bb4dfe75781c4436852fd425833f80020b95cb7764
font_01_sfnt_off00015acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ACB 11160 bytes
SHA-256: b0f2bb7ceea4b92e476e235daa98aa642833579bbe4397785063e91a378eb9cf

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