Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5df3ee58183abdc…

MALICIOUS

PDF

79.6 KB Created: 2021-08-26 06:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 688ff151cba8a9fdff7eb91e26f901d2 SHA-1: 08d0b9e095379db730dcaf945fb105ec71da599b SHA-256: e5df3ee58183abdc8d7544bc81bc921be130fafdc439c9115f37a94b75688242
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and links to compromised WordPress upload storage, suggesting it functions as a link farm. These links likely lead to phishing sites or malware downloads, aiming to deceive users into clicking them.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://medvor.ru/uplcv?utm_term=contemporary+abstract+algebra+9th+edition+solutions+pdf+download PDF link annotation
    • http://vinhthuan.asia/upload/files/9587120460.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec47d837fa---fedezuza.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/hdo6iggrchmgdr64fgcl1is2ao/genowakan.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/79456450784.pdfIn PDF document text
    • http://kingcraftviet.com/uploads/ckfinder/files/xutanabo.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/nutizive.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/b362a2aeef9ae11d3643f2184d24deca/zinapujilabaxilub.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/xonafetozazeditupufowukom.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/47544254944.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a7156d6d6---77537146278.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/51722684305.pdfIn PDF document text
    • http://abnicum.com/files/file/nezebikisuresi.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c15f2327e42---jupabufunozoloralaj.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad5046ae9---golimofitun.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b85139904b---zavasuzokixuredegebal.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/beniduv.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1474d7b4d7bbfd29e6365a4b191d975b/96943379563.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/gufupaxifi.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/dasenevolegixitorisu.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160afdc8537531---dusajamarevudokusu.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946a0a41c8a---37743221767.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8fbec7aa2---dekavafowozopulodora.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_off0000cd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD64 17368 bytes
SHA-256: 12311dd3a7f86873c03516542340445b6de558a6b890241f0184416f41f7ccfd
font_01_sfnt_off0000fa2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11246 11708 bytes
SHA-256: c701f08428b8934106f8eecb521652351fc4fd8aad9cccf778f72ef38cf81544

Open this report in the interactive analyzer, or submit your own file for analysis.