Malicious PDF — malware analysis report

Static analysis result for SHA-256 d925fc413fb2dd62…

MALICIOUS

PDF

74.3 KB Created: 2021-06-26 13:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3a43738acd8f34d4d3ae14ee03e31571 SHA-1: 2ec86cb18308689aef068cfa7a13495b747aeebc SHA-256: d925fc413fb2dd6231ff28b9889123f4ee0819163065087439209f98ea7f1da4
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to WordPress sites with suspicious plugin paths, suggesting a link farm designed to redirect users to potentially compromised or malicious content. The presence of these links and the overall structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/kd86bi06i5qoeh85upcgoav7t6/noxekopifodorujabaf.pdf
    • https://thedestinbeachhouses.com/wp-content/plugins/super-forms/uploads/php/files/68bd18b5efc677f49c823e660c8abbd2/9645278330.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160872d8a2bec1---nitunukakoxilexa.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//82426084612.pdf
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/j7pnm7o35c11er7ulflsl4edeb/69497240429.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a430d4e72cc---wubopapivuruwak.pdf
    • https://irisapp.cn/uploadfiles/fckeditor/20210603/file/16226926358287.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/tr5r6j4bm5ehg9ah89bbqs9qqs/sowavumowosejos.pdf
    • http://builderall.info/userfiles/file/2612550736.pdf
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wemisafipafujogibepuk.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c31095c3d---6109836804.pdf
    • http://myjobcareer.net/userfiles/file/2021052209360873499.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609deb7bbe0d5---vileluxeragabedefakamul.pdf
    • https://alakharia.com/public_html/userfiles/file/depixiweginawojaloweba.pdf
    • http://lutechmed.com/Images_upload/files/60038545127.pdf
    • http://cn-daomeng.com/upload/userfiles/files/36b000dd50567b68f21dbd4f6d8c6901.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c1cb9a780---27444020040.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087fc45c0cf5---32433119411.pdf
    • http://mofrantech.com/userfiles/file/ruliwavulejaj.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/lieool74mc73d356sp6iafkl7g/39539011424.pdf
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7eb8321fff---tagefewan.pdf
    • https://airshow-bg.com/file/liboxobetulalu.pdf
    • http://toshiteriyakiburien.com/uploads/files/381205617.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/36da3cfb81ab0dc87d30e9a80041716d/91697711683.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bf752d149a6---kajog.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c88258fc4---xopakipu.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/lmuce6qblgfq5u0enmlpc0v8ov/rudozefofenoriw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=wanted+movie+online+watch+hollywood
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c032.bin
80c4adcd3a722de6b742fe848f78fd202e1e4c36867a72ecaac51e2694c04ca4
pdf-font-stream PDF embedded font (sfnt) at offset 0xC032 16592 bytes
font_01_sfnt_off0000eb53.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB53 16792 bytes
font_02_sfnt_off0001036a.bin
98c0153c202f153e4054fee222cee6b17877b0a5ca9318d8f37532a252b6379d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 10624 bytes