Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0513ccf1ad2b1a…

MALICIOUS

PDF

85.3 KB Created: 2021-09-05 00:31:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1dea026a4ed374f7671dc17faf2f001e SHA-1: 87e8e0c71004d03f725d5e6277306024cb13fbe8 SHA-256: 6e0513ccf1ad2b1a0d7adebaf065b6e9eb3ac0fbffe42619d68a5219e841cc4a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607af4ba8603a---97511571761.pdf In PDF document text
    • http://kunbot.com/upload/files/kajopomevaj.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/madexo.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160897bad29937---konikibezanok.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/webamupawilitofaxizopix.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e8d6c1f05---44180958688.pdfIn PDF document text
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/zakidegarupulenesum.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096a85d88487---xegojiwarogebi.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20397320048.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d2b89a85f---bugonekazisurasekili.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/jogofudiz.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/84469042965.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8578be9207---52199116882.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/77971186347.pdfIn PDF document text
    • http://physiotherapy-warwickshire.com/user_file/file/76709491486.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/pamoxejovebebu.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606efd2d266c8---88220233983.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/90226728672.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/35793083211.pdfIn PDF document text
    • https://ms02bet.net/contents/files/kisabova.pdfIn PDF document text
    • http://irollee.com/userfiles/file/pegexijotaro.pdfIn PDF document text
    • https://nyirfa.hu/uploads/files/24846160574.pdfIn PDF document text
    • https://monyetmesum.com/contents//files/luwosijosibobijukadibu.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824cddcce12---1292136277.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=esa620+electrical+safety+analyzer+user+manualPDF 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_off0000e67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 18080 bytes
SHA-256: 5fed2427886311b36658e2c70fc6a3bddb278867ac52d29df285573e6f97b79a
font_01_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D75 11044 bytes
SHA-256: ae824a31f3b7a2b14d4ffa10a1178415aab8336dd2c928f8365ca91096e25e82

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