Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0b8550c440188e…

MALICIOUS

PDF

72.2 KB Created: 2021-09-12 08:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 845aa7148269c4cbdf088f01e5c60eac SHA-1: 5136b7ff3061f5683e4ea7465948001da5067430 SHA-256: 9e0b8550c440188ee3e146f3485ca541d1331baa50a1b1eb51ce3c36d932bbfc
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS platforms. The presence of these links suggests an attempt to direct users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pelletier-tp.fr/ckfinder/userfiles/files/dusifu.pdf In PDF document text
    • https://dakhoathienhoa.net/images/files/vuxatefikinur.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/31242791299.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/86739365910.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/depexejib.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a4ab24503cb02e7ad2d994a9a3852f9f/51734054780.pdfIn PDF document text
    • http://npk-bypassdrr2.com/file_media/file_image/file/2636559373.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/17480702700.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161333c7974f51---49094336485.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/nutet.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/gobirupanale.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/acb0846e76aa0c5f4520596f400e561d/dedilukifaxujunalarazawus.pdfIn PDF document text
    • https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/fupolojunif.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/gimixexutogewome.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/48930386641.pdfIn PDF document text
    • http://greathorserider.com/ckfinder/userfiles/files/93380221175.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7c14872ed---16528115359.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133125742deb---83925686012.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/nawolabive.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/nefutakavexeniwer.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/sigisuxos.pdfIn PDF document text
    • https://edarky.net/data/file/dopegegabatuvesobum.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/47838848509.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=cash+hub+apkPDF 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_off0000b91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB91B 17088 bytes
SHA-256: fc72ae12ca525c185fb208f3f61874dd9b80e1ad34be6a271a34db8d05c01f7c
font_01_sfnt_off0000e57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57B 10020 bytes
SHA-256: e9e96e70dee381391774cf2ab6a03be5dbdbb20a9572a4c8781834e139dfbc03
font_02_sfnt_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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