Malicious PDF — malware analysis report

Static analysis result for SHA-256 2971e5274bccd233…

MALICIOUS

PDF

81.0 KB Created: 2021-09-12 16:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c0f796e50bebd17d222afc568ff66fa2 SHA-1: a2b4cb5f56cd963aa8b844c96fa90ac16f45fdc2 SHA-256: 2971e5274bccd233cf7e5f8226b1d31ecb3c8c74db3778c812468013213365f2
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URIs and link farms pointing to potentially malicious or phishing sites, as indicated by heuristics like PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded links and the detection results point towards a common PDF-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pass-eco-energies.com/ckfinder/userfiles/files/59989747372.pdf In PDF document text
    • http://185.33.116.145/~acus01/upload/files/20504394179.pdfPDF link annotation
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4ce821c0f---munukabopebasa.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/romagakulobadupu.pdfIn PDF document text
    • https://gplacestracker.com/userfiles/file/53480233721.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109102101131431.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/pafoban.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/11558032550.pdfIn PDF document text
    • http://wawabed.pl/uploads/userfiles/file/dezerusifudelefuxiwilewel.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/21440705580.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/78385054139.pdfIn PDF document text
    • https://netlandschool.cl/files/lilixikimitipugifudoturaw.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613043231c099---14617342330.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/vufafakivonupujitovi.pdfIn PDF document text
    • http://geasit.it/userfiles/files/34302852948.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3a26e4af0---47657162934.pdfIn PDF document text
    • http://mayphatdienngocquang.com/media/ftp/file/givejisovurojumixowameve.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134888a5d74f---zefizovatuturat.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/rejofodo.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/50jqs3jpql7s3ftlkjq8aksolm/13124843548.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/kolapil.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/vinugolabepivugekef.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/84671245917.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/22671012460.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/92191843360.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/41723030777.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=best+tv+streaming+apkPDF 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_off0000d804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD804 18016 bytes
SHA-256: 23a7138ea94121a4b4c7b9f1db5af0e0ec716f0943daa4855c8773eca72fe22f
font_01_sfnt_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 10640 bytes
SHA-256: 656b819c933044f9f1ec6cac695c569eb03460a06b7e9fcb43a54ba32ee24e74
font_02_sfnt_off00011e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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