Malicious PDF — malware analysis report

Static analysis result for SHA-256 0efd7bf15ff56bf5…

MALICIOUS

PDF

81.8 KB Created: 2021-09-01 17:23:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d47dd9f932838bc2b85fee3c4760be30 SHA-1: f0815d212b20fa50460aec40f2e1c62d2ff02ea1 SHA-256: 0efd7bf15ff56bf5ff31c98a36d36a3adabf1b8976406a811cb7e63c3ec7fd7d
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external websites hosted on potentially compromised or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/92c40e2e4c6fb034a0e4fe953d505c1a/nilexowujawagabiganoliram.pdf In PDF document text
    • http://traiteur-ribot.fr/userfiles/file/foweb.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c122bf3e8fb---95305069502.pdfIn PDF document text
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/lorasazigovipirobumakukoz.pdfIn PDF document text
    • http://kowel.com/ckfinder/userfiles/files/1624279881.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8d4fc97c5---92507902502.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca5b20d987---gamokigekirewup.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/42640142037.pdfIn PDF document text
    • https://mmszke.hu/files/file/mumovufojapowi.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5771526c59---selujivubolesoruza.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/lij8paj9kjihl141lmnuomp1c0/75630961135.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/57751944293.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/mefuloxi.pdfIn PDF document text
    • http://apricomm.com/userData/board/file/nobepagogewetele.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/0rbd0hjpkmvdied042115ktk6c/86197570846.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/dijoxoraxule.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/vipajo.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/jifuwa.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846441c004b---junewukanarizuk.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/77034365855.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/siruguwalof.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/66318196456.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/52082911357.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4736ed9d6---jurugegapuduxutonevovovu.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f801510eff39b75f97720d5b162730ff/70976729395.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/15892900531.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=i+exponent+rulesPDF 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_off0000de11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE11 17312 bytes
SHA-256: de592c026400a811fc361508ef6f6555f051362a15dd717c4266b7e3ebabed1d
font_01_sfnt_off00010b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001233e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233E 10144 bytes
SHA-256: 17ec380ae1422ef17a87aaa99596a3c146a731609a9adfd01fb7d9db9308769b

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