Malicious PDF — malware analysis report

Static analysis result for SHA-256 e648f2d4b385bac3…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 23:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: bba93c2d83f4d9306cafe27c81d455c8 SHA-1: fa7ba871c0e3e2d402abbaf12b334251ad449054 SHA-256: e648f2d4b385bac32fbbcbf9a3083210ce9ff6df08c4f2a5a34f901d0a1ce024
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, which in turn host other malicious PDF files. This suggests a phishing or malware distribution campaign where the initial PDF serves as a lure to redirect users to further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.syah.org/wp-content/plugins/super-forms/uploads/php/files/45b605c199adb3beefe02e90a27398a4/mifiwelakewubofubijudiset.pdf In PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16086e7703c642---22779816131.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/8afb116f2cb7bd8cd326ed7ebbf16549/16681085826.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/17aej7atf2oaqua8nfeaqicjum/50188429793.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/semejeneked.pdfIn PDF document text
    • https://vanphongphampmc.com/upload/files/50087715191.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/11elsl90ao8dqe3rnq6hil3pig/56736264120.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/57e7dc48189471f8023d2408ff47f3a4/97513891411.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/falevopumimesebujodafavo.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ee459831226---59851990616.pdfIn PDF document text
    • http://bamor.org/userfiles/file/vemunogotuzuzovemema.pdfIn PDF document text
    • https://lexcyberia.com/userfiles/files/73437671712.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/52658625534.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/zojifadosevozewon.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/48acb35e8e76f4ffdfae3fbf05b61772/55947985533.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1e9737734---wagademofafore.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/fatusumip.pdfIn PDF document text
    • http://asahiru-ban.com/files/files/zitizexug.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161251bd211730---11544540165.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8de1aad2e9---57053940916.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/xosat.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/9670236091.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ea8f3a0ca---pogavenazaxadafavewo.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/67333525641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=function+of+ssb+protein+in+dna+replicationPDF 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_off0000b517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB517 15136 bytes
SHA-256: 38f5742db83577c66c9c838fd09576dc05d1f287d7b35c516e986d7d80f17ae8
font_01_sfnt_off0000da56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA56 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 10832 bytes
SHA-256: 4cad13c96dfd14f7501611fbd070597fb2ed061b7c619d2f39d14d10c78ea2f3

Open this report in the interactive analyzer, or submit your own file for analysis.