Malicious PDF — malware analysis report

Static analysis result for SHA-256 98995f90a45e78e4…

MALICIOUS

PDF

89.3 KB Created: 2021-07-29 14:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd364337ff651a15f62373e3bf08aa84 SHA-1: 717de916c9426818186140df6abbcdb35c28620d SHA-256: 98995f90a45e78e425787f88397b1a873a9e05ad8c0e42889388976a703bda81
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it functions as a link farm. The presence of URLs like 'https://queure.ru/uplcv?utm_term=how+to+generate+fake+airline+ticket' indicates a potential lure for phishing or malware delivery. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://queure.ru/uplcv?utm_term=how+to+generate+fake+airline+ticket
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/1cbf5e57f613ecc2ac629d4e09532f6f/mopokazibubuke.pdf
    • https://alakharia.com/public_html/userfiles/file/rubatov.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/53478850513.pdf
    • https://blogsma.com/files/roxonufenuzosokutu.pdf
    • http://foto-preiss.at/upload_files/files/zoxanajabimubam.pdf
    • http://hzjksj.com/images/upload/File/12571669898.pdf
    • https://ivanda-commerce.hr/userfiles/file/lavenodenasisevogav.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160867e72d5091---33008026230.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/7e780d0bffe362fa739b6e57873a3f97/8606264890.pdf
    • http://dawahcity.com/userfiles/file/pozexesunumonokosefo.pdf
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/c758241993f02af5c8d4c26d62732d07/31765781143.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b9b37ae4---13920412011.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f97bf4d58c---logiwepoxomoxup.pdf
    • http://cafegreenwichvillage.com/uploads/files/31284663829.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783ed481829---zevime.pdf
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lowosironagegujob.pdf
    • https://equator-maritime.com/userfiles/file/rufominajisafoturi.pdf
    • http://thuduchouse.vn/pics/file/93514529165.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8575d226e---lorotufaxewerapola.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9006fc4d6b---tezutoseb.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160bad5974929b---vadatadadu.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/ecodmv87udnn2th1jvq0pa5h84/fixukabuxujupodafoz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f68e.bin
415a40a9e6dc561e32159327a6d6de96ebad31ca8012a03cdf2e304086703098
pdf-font-stream PDF embedded font (sfnt) at offset 0xF68E 10512 bytes
font_01_sfnt_off00010ea1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA1 16792 bytes
font_02_sfnt_off000126b3.bin
2af63bee715d7235cd61f696d1ec4cd5870df0a4df5a28f3a74bbb7f6c868075
pdf-font-stream PDF embedded font (sfnt) at offset 0x126B3 19232 bytes