Malicious PDF — malware analysis report

Static analysis result for SHA-256 74dbc9817e39c01e…

MALICIOUS

PDF

95.1 KB Created: 2021-09-17 18:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2259f9e110b0fb4b5cf8ebb5570c8c3c SHA-1: e3450b74546102ab06c348b4fc3e4504c5449719 SHA-256: 74dbc9817e39c01ee3d2c14517606e488d6445412ea199d7782d8397c5699b51
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging strongly indicates malicious intent. The URLs suggest a phishing or malware distribution scheme, potentially disguised as a software download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://mimpiindahsatu.com/contents/files/gixosufareli.pdf In PDF document text
    • http://rileyillustration.com/images/agency/files/80283135581.pdfIn PDF document text
    • https://promptcorporate.com/ckeditor/ckfinder/userfiles/files/13991397117.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/47320325678.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/91689842823.pdfIn PDF document text
    • http://inlovehuahin.com/file_media/file_image/file/fexabubanegebuvozuli.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/vavonelolefutusugogede.pdfIn PDF document text
    • https://bloomeng.com/uploads/64478860118.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612eccfd91e5d---xadawusefapesowunumogu.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/43237816365.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/loliparutozuguzitutanufo.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/22800626264.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/80134539294.pdfIn PDF document text
    • https://ww150007.linebot.net/upfile/files/20210915153850.pdfIn PDF document text
    • http://hotelalbicia.com/userfiles/file/30257832252.pdfIn PDF document text
    • https://mfdesign.hu/files/file/76355212111.pdfIn PDF document text
    • http://aa-nusd.jp/migubarejufelezigepiwisi.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132f151a1d68---73648496492.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/nanekes.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/ff447f704a4fc4f7160c9d41eb4c52c4/9397668387.pdfIn PDF document text
    • http://status.cz/UserFiles/File/4183223067.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/eb4a08fe1a3965b196122ba25083e456/radotuxudugake.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=adobe+photoshop+cs6+patch+tool+downloadPDF 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_off00010ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA3 18796 bytes
SHA-256: 531e16a90c9aa0e078f1eef680ab13094de71c797b8614ee44f29c163c6f6ff8
font_01_sfnt_off00013df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF1 10792 bytes
SHA-256: 2dfc0141f91a8dca7f14c588db4a5fd63ec1518aad2798a7d4a59adc3c89d166
font_02_sfnt_off000156ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1