Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2520cc161b059a…

MALICIOUS

PDF

91.6 KB Created: 2021-08-14 05:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f6da64b2d8b9b11d02d941ef584376bf SHA-1: b9ffb49d060893e8c60c759d3535b952eb352d1f SHA-256: fe2520cc161b059a40000e97579ae2aac82a7a2c99278e66fe7c006789ea144a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple external links suggests an attempt to redirect the user to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://pixomot.ru/uplcv?utm_term=trackman+4+user+manual PDF link annotation
    • https://groupburuemas2.com/contents//files/89257168485.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/zurokupefejapoju.pdfIn PDF document text
    • http://keacg.com/upload/files/xudiwuwoxogu.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/tbrago7ctkgs0iutkt1ur984rj/74600070375.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/u4pcj0uaobtuuqf55ijapg347c/4844243512.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/65503508661.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/teferalamorabevopuxeveli.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/losisuxuposojemokevubukek.pdfIn PDF document text
    • https://promise-land.com/upload/file/3427672875.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97d1931259---nedefevinubuf.pdfIn PDF document text
    • http://perrymanreunion.com/clients/f/f8/f8644f0eb9578147d5589f75b8c3e300/File/14510779649.pdfIn PDF document text
    • https://webaprint.be/img/file/tiziriwinawebutog.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088b065a6e59---84567667818.pdfIn PDF document text
    • http://aurora-c.jp/files/files/94866889919.pdfIn PDF document text
    • https://pasarantogeldua.com/contents//files/dakilavefax.pdfIn PDF document text
    • http://amdind.com/userfiles/file/dutevet.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/63521ecd42dc2b15003fdcb3e7d8eac1/23223565948.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3a6f774013---tijaxurojuwunisidovoza.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d4a1cde9e80---vaneravesevebat.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/66050551447.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c991b0bc43b---54144680135.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/22731689773.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/2ppe0susa2n9od3q3bdh0vtum6/jaxonawijerafame.pdfIn PDF document text
    • http://bscartridge.com/pic/neguwufowazirubadiko.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/beluxarefezavo.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/82468548707.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_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 17716 bytes
SHA-256: b4286faf80d7705f23765c388c524646028fcab4c6f43b1656fbb9fd2441efdb
font_01_sfnt_off000131a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131A4 10316 bytes
SHA-256: 0f3d36c9eb35128098b38af3a14ff8ab83beceada05b5cef25aa97b120d4ad92
font_02_sfnt_off000148f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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