Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26904a3f74ddd39…

MALICIOUS

PDF

90.7 KB Created: 2021-08-14 00:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b27f31e6eec7ac85b8380cc24b1b74b6 SHA-1: af4b0620bd5e1e4b17914952391793aa8a684f01 SHA-256: b26904a3f74ddd39d74c7ec913146c70fcfad10e07ec846353d39f8b4c1eb37a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, pointing to compromised WordPress sites and other domains, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms indicates an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://drafthe.ru/uplcv?utm_term=yaariyan+full+movie+download+480p+filmyzilla PDF link annotation
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/q8tbq21dcmhpa8nlubke6qfef8/diwulekawuvupop.pdfIn PDF document text
    • https://o-dance.com/upload/files/xedekowurovemusulexasuv.pdfIn PDF document text
    • http://veterani-pushkino.ru/userfiles/files/kagufuwija.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/tjahq7s36l8ku7ssj156d132rf/96317196519.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/df48ea81a2544bbfeace82c6ac220a40/fekibik.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/12d8d9ef988f315669c2c004cb6faf4f/91534667706.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/38382165819.pdfIn PDF document text
    • https://imotrading.com/images/userfiles/wivifuramotinelixabujama.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607987205580f---kavuwusisubizikuja.pdfIn PDF document text
    • https://zionapostolicministries.org/uploads/file/25365638099.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbeeaf2346---87965915844.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/d0aa1b21fa1986bc1277b7dde319b354/55240424855.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/xitijununa.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/gizuvotutumopu.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/78lps6u88f1ltnia4abprk4sa4/tipujujetu.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/5fa0e6be3a7894da8e5f848ebdc84e09/nezazab.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/d804knhf86o74mvcelnql7n1of/lozib.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/b2fe7e0c4c910fd38ec082a9855dccfd/59279599657.pdfIn PDF document text
    • https://jdlpartnerss.com/userfiles/file/sazelavefepozegowoki.pdfIn PDF document text
    • http://eternoohydro.com/d/files/91799176627.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/68644468100.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e77ced4305---vurulevudub.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bdb2a60c5---dixubabukobibarumeduxusaw.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/tasamamuwemugurilep.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_off0000fc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8F 17124 bytes
SHA-256: dbc08ed635eef26d0f00aa1c7ee10bc891a61d2d4f9a510b09cff17349f165af
font_01_sfnt_off0001296d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296D 11212 bytes
SHA-256: 6dd578c3200e4b694fb3f9f2dddf4396ae34e731a16d235822a773758b6c807e
font_02_sfnt_off000143c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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