Malicious PDF — malware analysis report

Static analysis result for SHA-256 949be7cc740bd307…

MALICIOUS

PDF

73.7 KB Created: 2021-09-07 11:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 53722ef4c0aad0063a938dfc0c445ec4 SHA-1: 91e8de726ad888bca709b74b13d5bc3f534309ea SHA-256: 949be7cc740bd307249d3903252c9c2c279ce1e6c02f6188477f6a8104549919
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=evs+worksheet+for+grade+2+cbse PDF link annotation
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/cb55e37f85eee775208c04e722964d6a/98705267927.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/17930993405.pdfIn PDF document text
    • https://efnnma.org/files/file/69743912757.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a027b2b3be1---38143753764.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/pagoki.pdfIn PDF document text
    • http://richfield1960.com/clients/865265/File/22581917979.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/f98811007408dd2a9b370dd9547c2b40/giguge.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/i23u8qitldhhpp7hf3lq6cng4q/jatakifikiluware.pdfIn PDF document text
    • http://wasserburg.pl/userfiles/file/lizuzok.pdfIn PDF document text
    • http://vgkbuilders.com/assets/files/95473486104.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828ab0ad139---ninewubes.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608581612fcab---kabodozasaki.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/wominuzenabibuxugeze.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/33002458036.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/41721129794.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/18537490034.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/firobixe.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/rbt24e7hnhptubm5aovj575etm/81253722407.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/ganopazebapapud.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/43292152026.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fb8f9e098---42643518437.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/30068455665.pdfIn PDF document text
    • https://aspirans.com/files/file/59324196474.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/83679431183.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD406 11000 bytes
SHA-256: 2c4b5543a3d17a2b06ab505b886963b749c782e62fa7abde5cdf720f134d5705
font_02_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 17300 bytes
SHA-256: 0c2351d241c86aaf87bafa3366742d20abc42dc0c10062e2f1347d12a50d84bd

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