Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb659c6af081ba97…

MALICIOUS

PDF

85.3 KB Created: 2021-06-30 04:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c38551fa6005847776f76b49c6c266e6 SHA-1: 533f8bbca14b13262df79afdb3cb9ae5edc41fff SHA-256: cb659c6af081ba975b667de3d0afa18545f1357c7ccb9f2746fc06cb7277f3df
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns suggest an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609885e957b36---xalevesizelefarusi.pdf In PDF document text
    • http://project-lovcen.me/userfiles/file/gujevubugo.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b73b73b128a---89939199563.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea2a8bfe45---70166123956.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/792ae5d90cf751450ef9dce5e73d6c00/sulegob.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/9d45797ec495e696ccaba427a5388603/35314040865.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba99af2ab0a---40447897231.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/15426548773.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/959f46284a133d5adc2caf00a324cbe2/matopij.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a1d9af9b8---pinuped.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/5geleld7ddvgqr1co8d6r0qhk2/57522289603.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e702df0b72---bupadakanokavavumebopex.pdfIn PDF document text
    • https://penzionradvanice.cz/res/file/34016302946.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/gofejuti.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/54403327893.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/75690403952.pdfIn PDF document text
    • https://ovalpolycoats.com/media/75319022693.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070df7eabf0d---70872825927.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a508b9202d---66403516306.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/de4d52303deb678272bd36d63bda3ba6/43669103650.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b00f843db60---nulusopesazaxagojazujixa.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cdce2fe3e---94753918213.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961ef8c03b0---42064090021.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=about+laughter+is+the+best+medicinePDF 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_off0000ea06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA06 11036 bytes
SHA-256: 6a454a2b677fbf2f7f4a0d075c5926997e6259e5267077d6bd99ec0ed500a2a6
font_01_sfnt_off0001035a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035A 16456 bytes
SHA-256: 0d516e97e9890cd3c6493122792dcf1940f4a67bccc3bf71b0d609e2286b376a
font_02_sfnt_off00012e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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