Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6e58316fbaad72…

MALICIOUS

PDF

85.5 KB Created: 2021-09-23 23:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b22e23c158fdecb5c22524a608ba43f7 SHA-1: 82439e5f21f2064ce5668d20d4d9e2947917c566 SHA-256: dc6e58316fbaad7255536f09161c59a733ae0d3aeaefbe1dbc8625a3525d2307
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with several URLs pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were extracted, the embedded links are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/56859192132.pdf In PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/felulinolejev.pdfIn PDF document text
    • http://giaexploring.it/userfiles/files/40407246851.pdfIn PDF document text
    • https://nakipoglugroup.com/upload/ckfinder/files/buwilaje.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/dixof.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/2232393787.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/mupirijilorerafive.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/blc9pvqj9hf3oukicgj8h1u77u/tanisaxunonogefapisib.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/45465220260.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/potadotukinabozenufitose.pdfIn PDF document text
    • https://edarky.net/data/file/85677170433.pdfIn PDF document text
    • http://gugugroup.com/userfiles/57198586395.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/g1kq3vgcjsqdnp259tmcfhl1d3/ragofure.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/783c5c5a76d0cc4fa36e3172971cfcd5/99843713321.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146bce411148---morebunituf.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/zupedolarup.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/37326141742.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/44203849894.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/b3a0e31d2b37ac7168bc2ff92dedcd6e/50767690130.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/090348132241.pdfIn PDF document text
    • http://langfordfinancialservices.com/userfiles/files/67328921907.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/bobokozezedevukiwodosibi.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/93857891680.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/laroduraxelelogowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=best+hacks+for+androidPDF 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_off0000eb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 10672 bytes
SHA-256: 66a65ae6661223b680b1e2e15daccbcd50d99bafd8ac937665ae3238b68256e6
font_02_sfnt_off00011bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB8 17296 bytes
SHA-256: 47afed800e0ed2b69a5ffc1c6d02391cacfe86ea41e769149ea6ceb9dd485573