Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c07e9dd3bdd5544…

MALICIOUS

PDF

89.2 KB Created: 2021-07-22 12:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: be9cb0e92816ea4123d834d3cab705e0 SHA-1: 0637f6ef1a7036b8a05c913b51a9c2a372cbc52b SHA-256: 6c07e9dd3bdd5544b1b98386ba85f6044bdfcbff7dbedf989ba55b489f8e6b8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised websites and potentially malicious PDF files hosted on various domains. The presence of external URIs and link farms suggests an attempt to direct users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/8uaisfvtajgm6qb0gn8pl15jb0/84937622960.pdf In PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76c663487---77401317052.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085318d31b79---52598964513.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/bopevinirire.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///regidesaposebibodo.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/49323526606.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/monojaxazaden.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/92a0498bb9c9acb3336a85239d9256af/giketodubufajuditesiruse.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/delub.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1e6b7202c---15303081177.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160920b20d7534---34372721544.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf549b7b092---32914443919.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cba3c1e8c8a---vofesatoki.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/kelose.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075bebf07e39---63782942045.pdfIn PDF document text
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/68674121346.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/52090076481.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948799e6518---58667188613.pdfIn PDF document text
    • https://signika.pl/Upload/file/4322010283.pdfIn PDF document text
    • http://joewhitefamilysite.com/clients/59967/File/74073113821.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091f1abdec94---28873184863.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608763dc921bc---zifup.pdfIn PDF document text
    • https://vijyaiprismcrm.com/userfiles/files/bufin.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/babekefi.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/obp2t23mfooijok0b391sb7fh4/simonosenofafagumujumu.pdfIn PDF document text
    • http://asustainable.com/global/file/4977855437.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/68123268075.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=hcl+price+todayPDF 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_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 17244 bytes
SHA-256: 15a6a244fce4ff1a47531082940580da6d9242aff5487ca99538b7367fa182dc
font_01_sfnt_off000126f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F07 10340 bytes
SHA-256: a60277ed300a27985932f6521f34f46671b0106a650e9a70e244751b7d343cc9

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