Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e350581802e122a…

MALICIOUS

PDF

71.1 KB Created: 2021-09-14 13:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0f8bf785f3a731fc787ab8f9fee7375d SHA-1: 76dbd6137e879abd1f9aea0fd95aae265edd4247 SHA-256: 9e350581802e122ae902a6de8f0f31442e954df393ca8d21058cb39d8477f774
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to potentially harmful content. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=greek+roman+civilization PDF link annotation
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eecb43d933---tijenimalagugegedobola.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/87803185841.pdfIn PDF document text
    • http://autovoda.ru/upload/files/wefutajugakeniki.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/gadiwojoxekumug.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/fb1236f086826dc849545cb0e146a8aa/zanodi.pdfIn PDF document text
    • http://valeneighbors.com/userimages/rizabaral.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/ferisodope.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/777520495.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/96909642098.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c75e364ca---bebijekaketek.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/n0dvua5g14bdkhi43qcpnn1oj5/kakolawibononugelujer.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/21064419125.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/sijonanezakudibimekodud.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/27451225186.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/030532317554.pdfIn PDF document text
    • http://terminsk.by/pics/files/fegeximepapegefuxadarubux.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/zukefatisek.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/92617014865.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/40746bd5ca9288ae3f7d5c3d9731ed4f/6108666614.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/pepewodenob.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/20064484210.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/mabelulowata.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/112309312110.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/ecab1eafbe97bdd6905146b78af6083d/27941424944.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/vowinabi.pdfIn PDF document text
    • 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_off0000b4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B8 10480 bytes
SHA-256: 4d6db0cfd4c79f5b7da045d4d23cea301f1ce54a509a6b4448a471a56dfad234
font_01_sfnt_off0000cc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC93 16536 bytes
SHA-256: 895bb1ee2eaa527eb4199054c5d7527354aba0a933bfa6f0df7325304cc013a2
font_02_sfnt_off0000f6c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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