Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa492ff14050e6a…

MALICIOUS

PDF

88.0 KB Created: 2021-08-04 15:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cad763d9070593b0579abe5b8fda9625 SHA-1: ab4f4561d40891cb3622e969f3d3d46b935ae320 SHA-256: 7aa492ff14050e6a72c7133e53715326847f491add68e11acd74d5ede58de05f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with a phishing lure designed to lead users to download additional malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://broadcasthub.com/ci/userfiles/files/76234766936.pdf In PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac94abde91---tiseludakoxatet.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160becd1ac31ce---33245854712.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/a970254ccb2d61936f4476acaa7a54aa/dopeguzuwutodufagi.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/85395715378.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077cd9a98481---15191385426.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/pa0nhdh5jg7thvbilmfb3h11br/xozofipodazikofokeje.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/mefivumavibobe.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/kipafatedu.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/27597233579.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/d0d9927b40eea592eead309821d4bb4c/1628108116.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/jujajorotedufuf.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16087c8257da54---dasesukinibefexaxoso.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c871a7c10a---19516174177.pdfIn PDF document text
    • https://noddy.nu/images/file/65990702636.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608749a20b303---lodagubokilizoxos.pdfIn PDF document text
    • https://atesolve.com/ckfinder/userfiles/files/40321601640.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/34ab7555cf6bf330ed9a4fcf5217302e/18469100329.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/fosezobovelavewomiwasin.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/30287007222.pdfIn PDF document text
    • https://albizy.com/ckfinder/userfiles/files/52445475894.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/uuo5ioeo3m8eks3r747au4olj0/20121708467.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/bejugefamofi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=como+calcular+o+reajuste+do+aluguel+2021PDF 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_off0000ec25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC25 11072 bytes
SHA-256: e0b5de7481884e257bae2aae6fd2374f1278d78adfef5f625d5bafd581e2b526
font_01_sfnt_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 20140 bytes
SHA-256: 583d99f2c2c35a189a3df343249c801fb61876d8cdec692e9e302e8156da413d
font_02_sfnt_off00013872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13872 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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