Malicious PDF — malware analysis report

Static analysis result for SHA-256 f750f9cde6be38ac…

MALICIOUS

PDF

87.8 KB Created: 2021-09-11 10:27:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d86311672e6609c09a5d5bdb73bad5ff SHA-1: d8cba2084dc30ccf6e6a56f4ed4de269b7f7117c SHA-256: f750f9cde6be38acb5031e5820e2b8c77a3bc64d17d66ba144596c6d07e2939f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1190 Exploit Public-Facing Application

This PDF document was flagged by multiple heuristics, including ML classification and ClamAV, as malicious. The 'SE_MFA_LURE' heuristic indicates the document is designed to harvest credentials by requesting MFA confirmation or one-time codes. Several URLs point to compromised CMS uploads or disposable hosting, suggesting a phishing infrastructure. Although no scripts were explicitly extracted, the PDF structure and embedded links are consistent with credential harvesting campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://gulamanis.com/contents/files/tojipasiwitoguze.pdf In PDF document text
    • http://4998horo.gmmwireless.com/contents/files/pobojufu.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6e6b8ef74---kimogopasejinezu.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/87598935043.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/xobigijofawodojesezo.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/5246959473.pdfIn PDF document text
    • https://questyme.com/userfiles/file/30854295.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/83425081288.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/nunaxa.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/49763130518.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/94069809891.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/40777910227.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/44965515705.pdfIn PDF document text
    • http://wixoon.hu/upload/file/53998846964.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2d4635841---95962114060.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/jojeki.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/48387279582.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/wuxujas.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/wajigifefufofoxupu.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/tbmbccu8sse49pefge44tq8g2g/34049180965.pdfIn PDF document text
    • https://okazionche.com/files/80075374892.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/nonora.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/90188488986.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613192fd81545---goduvarapenesupagiviwer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=simply+piano+premium+crack+iosPDF 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_off0000ef2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2A 10816 bytes
SHA-256: 742024517f32894f469d65d189ee4e53d171ac81e908a5bc89ad4a80e809b431
font_01_sfnt_off0001080d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1080D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001201f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201F 18948 bytes
SHA-256: 3e5941a7232722f2995cfd8139ed7dab362ee9db1a6020abeab3a56d70f11758

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