Malicious PDF — malware analysis report

Static analysis result for SHA-256 7202cfcffc9f12ef…

MALICIOUS

PDF

86.0 KB Created: 2021-09-12 14:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5b809d37aa4ce9278ee54e4a8a51d618 SHA-1: ac7b5a5a49f80e0bef4a55cc7ae9dddb93834063 SHA-256: 7202cfcffc9f12efbea1706bf393fbc3841d7bc6f21304b214f7c683aed8aed4
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and numerous extracted URLs suggest the document functions as a link farm, directing users to potentially harmful sites. The SE_QR_LURE heuristic also indicates a potential for social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8e359d812---9617435590.pdf In PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/kopekopi.pdfIn PDF document text
    • http://julianina.dk/upload/file/41585471199.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/84968157988.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/rodenazexebubelegotarumo.pdfIn PDF document text
    • http://dsraxys.com/uploads/66680541871.pdfIn PDF document text
    • https://brukspec.pl/upload/file/50665873104.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/46500609049.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/xejurubide.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/luleledexorutememo.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/71685298978.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///nemogewutunikunolepasewu.pdfIn PDF document text
    • https://fultoys.com/userfiles/11467224034.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/21642283155.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/puxidikofewodof.pdfIn PDF document text
    • http://congluc.com/upload/files/99649316096.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/nazekemuteru.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/27972227748.pdfIn PDF document text
    • https://apra.pl/files/file/3120711823.pdfIn PDF document text
    • http://kleinschaden-expert.com/userfiles/file/92277223617.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c386a0b1ab---61311875899.pdfIn PDF document text
    • http://clinicaveterinariagoitese.it/userfiles/files/11627544043.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/74877719363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=what+is+android+dialer+used+forPDF 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_off0000ed57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED57 17328 bytes
SHA-256: 2045e33594490559a1e00d3cd4e78f47bd32f83dddb5c2e8bdc9f54f51730287
font_01_sfnt_off00011a1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13232 10544 bytes
SHA-256: 30045bd99a71faa248031d24c411f7c5afcb2296ca3aa02d244714970cfa5a0d

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