Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7f204b5e7bb787…

MALICIOUS

PDF

81.4 KB Created: 2021-09-17 11:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4418ac4e376c66f206dbb0a40b4b4220 SHA-1: 8a30f47dee183054428b473ea7f1316caac5b372 SHA-256: 5e7f204b5e7bb787d252efdd53f56d7836d05d096a725c20fc1f33df436621b0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The file likely serves as a lure, potentially for phishing or to download further payloads, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=qibla+locator+android PDF link annotation
    • http://24cvety.ru/upload/files/35426416665.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/gakumexolopawegoritin.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/mozugopabe.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/38812444059.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/wirefajodijifobegogulo.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/dojezamozimatuzevina.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/92792862612.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161425bbe4ea3d---56142959929.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8bc454bc6---gisuvefuwasavutavalafowen.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/tutugibufovolen.pdfIn PDF document text
    • http://old.smartplus.pl/ckfinder/userfiles/files/pubowefesamoruwinebufu.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/58632471918.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/xaruvexifalutomuzudepel.pdfIn PDF document text
    • http://www.prakashirrigation.com/uploads/fck/files/16237197150.pdfIn PDF document text
    • http://ydyb.com/filespath/files/20210909032411.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/52617030106.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/92215367165.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/kosezopubozivifadogevizab.pdfIn PDF document text
    • https://muzpony.de/obrazki/file/tosafupobokedeno.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cb0d3ac36---558079241.pdfIn PDF document text
    • http://gemmacapitalgroup.com/foto/file/47987117570.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/24036628493.pdfIn PDF document text
    • http://getwealthythisyear.com/ckfinder/userfiles/files/61051429685.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/towubopofutila.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/9hvde68t526na98nik3of5cllu7j1f9v/limopobonobawewanerum.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_off0000d92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92A 10260 bytes
SHA-256: ae88609a4260c7e6ce7db8d099955250092f427603723872a9ea7c41aff7068c
font_01_sfnt_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 18128 bytes
SHA-256: 318f7f0b9585d253b5c62525b96a131f46b1929737bb87df10a66b904f9be8bb
font_02_sfnt_off00012001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12001 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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