Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e179c69fb6de94…

MALICIOUS

PDF

95.8 KB Created: 2021-09-08 04:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 83c5dccce5fb8bc73b3e9ce0dcecc5bd SHA-1: bea015e5e3850a72e2788492a9a19e69bd546423 SHA-256: c1e179c69fb6de9489c367621d781f7dd911c33f033447f498674e8392a067ba
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a tactic to improve search engine ranking for malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://mimpiindahsatu.com/contents/files/jigulunojovuduzetuze.pdf In PDF document text
    • http://guerrazzi.info/userfiles/files/46680739243.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b31d5c3a590---xutiwelosutagef.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160caa51a10020---vakifaduzadivet.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0aa48101---tarepelebinozomapuwoxuse.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210714_8F54208F22F2F1DF.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/xemom.pdfIn PDF document text
    • https://scavilecis.it/userfiles/file/29421192062.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/zamuluxuzipawagod.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/bojinesosuj.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/gakakaga.pdfIn PDF document text
    • http://dhleisure.com/ckupload/files/vivoxavanaxawetipulabe.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ecaaf8d2588---puvepoz.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/josulafuxiror.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xunokaxesip.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608e40d6ed9ce---raseli.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/suparirakuvebavanevifuki.pdfIn PDF document text
    • http://doyen.cc/images/upload/File/29715431380.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/siroga.pdfIn PDF document text
    • http://livestocktool.com/d/files/27055323345.pdfIn PDF document text
    • http://4reality.cz/userfiles/files/vobozirefudalajogitin.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/83306244746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=libro+todo+pasa+por+algo+o+no+pdf+gratisPDF 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_off0001060a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060A 23092 bytes
SHA-256: f0fbd6bf9be6071506e04ad855ea1eda978afc080d700054b04d663e3f6d5315
font_01_sfnt_off00014135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14135 10640 bytes
SHA-256: d800084be3e280c3f5baa40247bd6d00c76004bd54a370a6e8346f5221c88306
font_02_sfnt_off00015935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15935 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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