Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff44a3d12ff65d97…

MALICIOUS

PDF

85.5 KB Created: 2021-09-05 03:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b5c810d094d0d6ab22bb9a2f3a2e1bf SHA-1: 54fe9ee021c6cbef554caa58c946144f0984eb44 SHA-256: ff44a3d12ff65d97aa2a249bf043db2b10a8492c4702e1c1850c032e822811d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The embedded URLs suggest an attempt to distribute malware or conduct phishing operations.

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://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/cfd6a93f5d2d3c63ca77a4e196fcdba8/lubowejevugimu.pdf In PDF document text
    • http://njuhome.pl/ckfinder/userfiles/files/98648246531.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/1a64882143a1eadcbef88cc768888e05/57153217565.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/mozilanezerexagidizaxepa.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/f1c5b2681b4996eec0a72dd96b35e54f/doxudatowutajamawojemoke.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0face90109---15759043100.pdfIn PDF document text
    • https://duel.pl/userfiles/file/xapofimed.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e89b009fcb7---26625314434.pdfIn PDF document text
    • https://krossi.ru/images/content/files/74245462245.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/de7bc7f540bc84a1431a6ad456ad589d/55115285891.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/92653018505.pdfIn PDF document text
    • http://carroll1975.com/clients/4/4e/4e2b018d07aaa5a30c3e4fca1c7a8df7/File/sudafutotuzosisebuza.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/pq3fj0mgb51v0vdud0tm1ghncp/89571883038.pdfIn PDF document text
    • http://jmlukanich.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10005746217.pdfIn PDF document text
    • http://954move.com/clients/4890/File/filavebalenuwukebebub.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16109c282f3a2d---goxig.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210727173838531.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/nixifijanaziwig.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/tiruxakawulusifoditurajel.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/4867803825.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/54922269291.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/94945235968.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/jawawumojikidat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=plant+parts+worksheet+high+schoolPDF 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_off0000e98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001019d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019D 17544 bytes
SHA-256: a4b4b84c93f6a3394bd93b65435d719e75cb48315cce179bb4b89d0ca9887d8d
font_02_sfnt_off00012f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F14 10832 bytes
SHA-256: c2f7c1ec7ed7d94b3b06776255ee012f17d79c21803ed95ca170d5e6c33a68a0

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