Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae44b62fb1e7651…

MALICIOUS

PDF

87.0 KB Created: 2021-09-06 02:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 45dc4288405728a112fa96df80af91be SHA-1: 07e66dee4ea6f6d0dd712b73d325a5e15142e039 SHA-256: 1ae44b62fb1e7651e0980267fc61a175ac4ae0a27f943999e62c2f6fe0cf9449
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple PDF link farm heuristics reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://turismoporsantander.com/aym_image/files/jenakunaliwemuzufitewes.pdf In PDF document text
    • http://stroisvias.ru/userfiles/file/25307077139.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/20709937403.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210605070930.pdfIn PDF document text
    • https://vestol.bg/files/file/pexogolajato.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa247ff8a---remaronavovilegi.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/zosepe.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/jobanok.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8d7c86a61---jibowopojomo.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/7qplr85mcj6icv57epjs4psm59/19469259215.pdfIn PDF document text
    • http://mppscstudy.com/admin/usercontent/file/60469706254.pdfIn PDF document text
    • https://shoreluxurylimos.com/userfiles/files/vejusozutapi.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/97885516353.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5a590afd1---20860819116.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/de79d71d621bbfc3311c7c7eaa6bc0c9/70600575363.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a81241a662b---tebogevud.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a88a6ee61a---pekatov.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/baxalidevumubowevaf.pdfIn PDF document text
    • http://bernendorf.ru/userfiles/file/57257499608.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/kedusogababipogofaj.pdfIn PDF document text
    • http://moristas.com/userfiles/files/tadilazojokil.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/17939784948.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/21808550252.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d4f6e6e992599199c5b62386a6ae69f1/timutugadijejux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=free+cover+letter+template+download+pdfPDF link annotation
    • 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_off0000ef62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF62 17968 bytes
SHA-256: 84665dd8d04b9685081c760e1a05201bec9cba4b53ee8daed5a169d72a55a56b
font_01_sfnt_off00011dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCC 10648 bytes
SHA-256: 7f2700a8d67dc6db91e5517c872301ee608ae8e894041faaf23e427a64c34e22
font_02_sfnt_off00013635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13635 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.