Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2b2dda98b12abf…

MALICIOUS

PDF

69.0 KB Created: 2021-10-05 05:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 599675bd90433dad68230bbd1580aab5 SHA-1: e2845f4e49cd6830cd2efd73405544e23db07420 SHA-256: 8e2b2dda98b12abfd17f6678ba65d918cdd2f09d3aaf87b503840b2fd7de7880
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The heuristics indicate it's an image-only document designed to trick users into clicking an embedded link, likely to a compromised CMS upload or disposable hosting site. While no scripts were directly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://coomargroup.com/ckfinder/userfiles/files/denasonufumazafiwivo.pdf In PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/84458813085.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/21626032455.pdfIn PDF document text
    • https://pindimana.in/uploads/file/vuleji.pdfIn PDF document text
    • http://www.moyekolodin.com/files/beninelatiruxurenete.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/lidasa.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16155eb30f3a3c---dupevorogivemi.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/251758112943.pdfIn PDF document text
    • http://yjccnc.com/upload/files/jeluxotimasanagevalit.pdfIn PDF document text
    • http://mlight.cz/archiv/file/7009632397.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/xexalitadokurusak.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/xevadi.pdfIn PDF document text
    • https://bandloc.sbchecks.com/FCKeditor/file/rivulaxizezomojin.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16153b6630c24e---34815113523.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/5040504854.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/599843323bdf60a24ea3fe5a411db396/36180277041.pdfIn PDF document text
    • https://icbacademy.com/upload/files/20683286332.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/tabekixodixositesukomot.pdfIn PDF document text
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/sekipi.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/41834405279.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/t2gome8ru2c8j207ouf9kujdm7/liwulag.pdfIn PDF document text
    • http://vipdiler.ru/files/file/maniwumas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=multiplication+table+of+31PDF 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_off0000b25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB25D 10660 bytes
SHA-256: c2038ab4917408bc80a18c9a33a9ac656d1cda07e4ee2396aeff08c18e1eb093
font_01_sfnt_off0000cac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC3 14336 bytes
SHA-256: d153881d9ad71ab6ffcdb2c74c8185bf3e1b6bcd40455d97bf44617b7a7d526f
font_02_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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