Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad573871e166da7…

MALICIOUS

PDF

75.2 KB Created: 2021-09-20 04:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: faab6f6b139cb56cf63151b21db44c9b SHA-1: 2e251f15c18d933ec0ea8f26354079a396524ff1 SHA-256: dad573871e166da778fed181f8fe6983eb52fc7c5bc67fddd529ea86c5b94f6a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous embedded URIs, many of which point to disposable hosting or compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and a link farm heuristic indicates an attempt to lure users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=screen+cast+android+to+firestick PDF link annotation
    • http://studiotecnicobergamaschi.it/userfiles/files/teluba.pdfIn PDF document text
    • https://aldwalia.com/userfiles/files/zaruxozoku.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/68515085029.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/duminafogipanuwoxofonov.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/j6och6bqog0c6k0phl5fi9iei1/47786372519.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/30908484760.pdfIn PDF document text
    • http://kolaykanal.com/userfiles/files/32927301534.pdfIn PDF document text
    • http://lex-ter.ru/admin/ckfinder/userfiles/files/bowemefitobivaxerugefawuv.pdfIn PDF document text
    • http://hak-al.com/resimler/files/fepevinoja.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133188fedcd8---pufevesoduvanikonepekazo.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/magumukes.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/potiga.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/88207566360.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202195655461180.pdfIn PDF document text
    • https://spacio.hk/attachment/file/89596017752.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/cs1g1mldptua26hgh2k846ev5j/ragigiwigifowakugimowam.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/44059440865.pdfIn PDF document text
    • https://aedwea.com/upload/foto/fegumunamin.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/neniboxejosisegasiga.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/gutafifonunabinamijogobe.pdfPDF link annotation
    • http://czminghe.com/upload/files/guwikitisorivogoxaro.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/danusenifuwojes.pdfIn PDF document text
    • https://tkbhanna.com/ckfinder/userfiles/files/65997432113.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC023 10588 bytes
SHA-256: 51095ae2b612dc2c184008e9b18b0614764f16116d6fd52bfd1c8e99df6e0568
font_01_sfnt_off0000d875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD875 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF087 17968 bytes
SHA-256: f1b7da7ea080493b3f41a16d1e895f84206f3cbc1e28b9a9f678a89c07c92cc3

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