Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7586a2e9de2e7d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-05 20:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82ce9091160b6182cf098b77b0c8978b SHA-1: f04b2d74e02a1b7228903898989f38f7bd90d2e6 SHA-256: 2f7586a2e9de2e7df17da440978af50229865992756d0636957314bc3f339fad
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2ab68bf9c---vipukonamakisuzaxuwosu.pdf
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/64455535741.pdf
    • http://phutungvespaco.com/luutru/files/81139740931.pdf
    • https://kingwaterpure.com/ckfinder/userfiles/files/71037104418.pdf
    • http://fusen-es.info/yamituki-n/uploads/files/ropibomunekefugu.pdf
    • http://alphabodysupplements.com/newerac2c/userfiles/file/ledavapawesuj.pdf
    • https://wolfgang-photography.com/userfiles/files/7972431280.pdf
    • http://kag.fr/userfiles/file/90728222177.pdf
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607302995914b---16715638168.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/pu4hrs3gjueah4sr3a7p7ge437/lewema.pdf
    • http://easykart.store/userfiles/file/xazutepojowuxogu.pdf
    • http://dush-kz.ru/uploads/fck/file/kujaxudize.pdf
    • https://actorconseil.com/files/file/siwikidofavalepofup.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a814a960ef4---44200389916.pdf
    • http://bbfederico2.net/userfiles/file/33010245496.pdf
    • http://www.tramag.pl/upload/file/liduzadapolodulames.pdf
    • http://archetipoingegneria.it/userfiles/files/mulibogab.pdf
    • https://artlabjo.com/userfiles/file/26809486645.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/109085c1cb38ba678728a29a59add5f2/tikixipef.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/65dd7e4bc96d30c08f6e03e364db2b27/lefemi.pdf
    • https://alate.org/admin/fckeditor/editorfile/pasasedenekoxage.pdf
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/fc2988e233d6dc5c68c962f9a88c4e62/muzebututekolisifowinizig.pdf
    • http://www.pattyn360.com/upload/forum/files/68519561895.pdf
    • https://rkdestate.com/userfiles/file/32302185774.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=franklin+templeton+sip+cancellation+form+pdf+download
    • 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_off0000dfab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAB 16792 bytes
font_01_sfnt_off0000f7bd.bin
f38361770e5b22c6c0ea90510cc9784ba0776f94f9339a333dd38ba63e967e70
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BD 18356 bytes
font_02_sfnt_off000126da.bin
4752f740f922f5b9d86614c62a3f3e07e2d2049a6b24fe7753b9f7260e0496c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x126DA 10936 bytes