Malicious PDF — malware analysis report

Static analysis result for SHA-256 e375222e612692b9…

MALICIOUS

PDF

85.5 KB Created: 2021-09-17 07:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 04aee46090dd10bbedae327c72806d68 SHA-1: 5d9fe3df14459dce88043813723be6c08099bdb5 SHA-256: e375222e612692b9599c1911520c6fff78f1e86c0ce47acad000da800318b1c3
156 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload storage, characteristic of a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the structure and URL patterns suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://glamweddingdesign.com/userfiles/file/pisovawitafozinuluwegadan.pdf In PDF document text
    • http://thepokeluau.com/uploads/files/34267587235.pdfIn PDF document text
    • https://argumentua.com/i/file/lidemewupakibogopox.pdfIn PDF document text
    • http://jawarakreasi.com/file/nosetib.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9b7c969b3497feaa42e46e661d3122b9/76437856993.pdfIn PDF document text
    • https://adetexfoamgroup.centralcms.cloud/galeria/files/migapesila.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613399249af3c---70033317732.pdfIn PDF document text
    • http://krukaiart.com/userfiles/files/femoposunufefaxomalo.pdfIn PDF document text
    • http://kmbb.at/userfiles/file/47045489136.pdfIn PDF document text
    • https://hotelgaric.com/upload/datoteke/vewanulewekeniwez.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/da2dd5b3de36d08f11227f8d0bcdbbc6/88291401305.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/70664878645.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/63660791709.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/96117027830.pdfIn PDF document text
    • http://tieulongcopro.com/luutru/files/91575702215.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/lijazufagamomitenaroduz.pdfIn PDF document text
    • http://daechienglishpark.com/ckfinder/userfiles/files/jixedipidiwukuleto.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/77547470988.pdfIn PDF document text
    • http://tsuiteru66.com/userfiles/file/fatabafujewavuzikuxibafal.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/ranigaretanesakizele.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/53e320bbb8b0a92310d0d339a021e65c/6797927509.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/54360152302.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/lotulifizalevepagefesovin.pdfIn PDF document text
    • http://mathrainbow.com/userfiles/file/53908246193.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/xofirodelorukitutawiru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=osu+for+android+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_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 10432 bytes
SHA-256: 2ae7667a082521a397d2fba028c3580b07f36d7ea9143bfcd203ddc828feec44
font_01_sfnt_off0000fc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8C 19172 bytes
SHA-256: 518c079d620b12b3689dfcdc6eae817e8e5815d48cd531aecb2509e2292be0ab
font_02_sfnt_off00012f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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