Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e2f44339be0207…

MALICIOUS

PDF

90.8 KB Created: 2021-08-19 06:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2de9d815b27e04f55bad0eedcc0bb894 SHA-1: bacac50cce5f99cd551dd29a5a6dde316ae6edaf SHA-256: 75e2f44339be02074e009d71c75c34927c1dcf851a60c32d2a94a0c963de18fc
156 Risk Score

Malware Insights

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

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that form a link farm, pointing to various compromised websites and disposable hosting. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/31ac6261f27c4f62b0c3975e977c9bfd/xojokowelejagevejir.pdf In PDF document text
    • http://alexhofford.com/temp/files/file/ralaxipojamerojiv.pdfIn PDF document text
    • http://lussoleathertiles.com/test4/EDITOR/example/v2/userfiles/file/77226932339.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/608fd7ead7cb81b8503c2bf095385cac/xivufegusakutuxu.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee18983ab70---2473494469.pdfIn PDF document text
    • http://sms-dk.com/FileData/ckfinder/files/20210716_B936207BB29F820B.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ns7vnkl3lp3l0d5480a19dbm80/suduka.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/22746992611.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/90959651434.pdfIn PDF document text
    • http://studiodispirito.it/userfiles/file/37711804791.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/71434859350.pdfIn PDF document text
    • http://air-con.ru/upload/files/43797147139.pdfIn PDF document text
    • https://vestol.bg/files/file/18227906630.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/sirabufapuworalafe.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdd36857e---tanemupet.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/gusuwujowusunixenenu.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/latiladiluduxuxavuxodo.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/36097636403.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/71775225b3e55d32a2f6944142b24d3e/lanajekoso.pdfIn PDF document text
    • http://keacg.com/upload/files/97268135081.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dousbvugk8kv0ca32jc294j7f2/80393299773.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/79238612880a8596f31782b540860be4/dolevikuxaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=divisiones+2+y+3+cifras+pdfPDF 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_off0000fbe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE9 18144 bytes
SHA-256: 1ba1bb1ac7027b43b4639c41b72fcbeac7d4cde1673910ecec28418d0c7f293c
font_01_sfnt_off00012a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001424d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1424D 10944 bytes
SHA-256: 75c04f333ecabc7a06b638c8648c9d81bfc36f126457c2de70f11e94233de999

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