Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00f86c267b4254b…

MALICIOUS

PDF

74.1 KB Created: 2021-09-18 08:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 5afa07844a9b5713960ca5fd26cf5e3d SHA-1: 0c290001fd857ed571ab0db004ab88b3387e0936 SHA-256: d00f86c267b4254b4ca3f098f427b69165dc17b90634e23c2cbaf5afbb65ed0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://crysiq.ru/uplcv?utm_term=avengers+endgame+full+movie+free+streaming PDF link annotation
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/lipujogorugevabakezem.pdfIn PDF document text
    • http://dsagco.com/Upload/file/14243281069.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/6210971d00bf685b8897f28a234bb11c/muvamodidogaweforisazuzik.pdfIn PDF document text
    • http://kxqcgs.com/filespath/files/20210914160104.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/10473482506.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/87493001338.pdfIn PDF document text
    • http://dejede.com/userfiles/file/80535914910.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/dixetemo.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/90273007859.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/25817327611.pdfIn PDF document text
    • http://uzmansporzeminkaplama.com/resimler/files/zadatolekapan.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/3656254814.pdfIn PDF document text
    • https://valubil.com/public/uploads/cms_file/cms_files/pulonuvusobuvogilojovawep.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/68c1af7df9661048952b2b4866c9fcce/25443565986.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/wiguk.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc19a5226f---82877012245.pdfIn PDF document text
    • http://globomax.eu/userfiles/file/88147105431.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/24375702042.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/37200110148.pdfIn PDF document text
    • https://asi-filter.pl/files/file/53987201853.pdfIn PDF document text
    • https://shiprapublication.com/uniformkontakt/userfiles/image/files/13456207708.pdfIn PDF document text
    • http://banquat.com/userfiles/files/14926727682.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_off0000bc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC72 10844 bytes
SHA-256: 2c202f0b986e76d485b577621df66f5add33c6c0761e29fd07ac0dbec175a9c0
font_01_sfnt_off0000d551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD551 17564 bytes
SHA-256: 1810a1f9df11f2f481102d99347b0535515b710a48fd7addb0b32bfe47419e88
font_02_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1