Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b4d9a83678dfd6…

MALICIOUS

PDF

86.7 KB Created: 2021-08-12 08:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 9498f8ec671fabb09198c977248ab5a7 SHA-1: 7d4bb0bda8890e20ed408b1027cdec567d6eda3f SHA-256: f2b4d9a83678dfd69c8a8da8f8019ae3fa9172b126d2d07f3583acee281ff452
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains multiple links to external resources, including one pointing to a compromised WordPress upload storage, suggesting a phishing or credential harvesting lure. The PDF structure and embedded links are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://gibisch.info/files/files/8077399659.pdf In PDF document text
    • http://jogamiskolc.hu/ckfinder/userfiles/files/99771624889.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/jfr30vh3fhcs0b6hqttntnkaj1/34368684098.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/3aa59411f6632683ed9bd2dfa23efe64/gawivajitubi.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/1p1l8qul1c3ckut8rrt4obldr4/78918345972.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/sns52aeseubo62t667dpr45dp9/37957310756.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/labinurere.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/211843025860f15fd54be4e.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/64824913758.pdfIn PDF document text
    • http://wych123.com/upload/files/zomobotumutegedara.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160fca8f9cba5c---bazuzev.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1620879459846253002.pdfIn PDF document text
    • http://mail-ex.net/userfiles/file/fapareketuneg.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/7169112911.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/107b826c511819544566cb747cae2a50/sejumedatesafukusumezafu.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/eb466855d3ed0c527ee8eb14838c410d/49099078845.pdfIn PDF document text
    • http://bowenworktimmins.com/clients/e/ed/ed750a77e36579213b976c45729ba45c/File/supek.pdfIn PDF document text
    • http://regcureguide.com/files/files/37483467596.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ii6mvbqr92gs4rsqoh8qhspke2/kidemodufarufupobi.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/80493888837.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/xedogotolunal.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/73147796062.pdfIn PDF document text
    • https://anfauglir.com/images/file/20460803971.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=preview+plein+ecran+premiere+proPDF link annotation
    • https://www.rt9.rspo.org/ckfinder/userfiles/files/namajitatumaguza.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_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C0 10420 bytes
SHA-256: 8f08ecee94d873cb25041086b20a1757503cf8e7435ce759d25741b9d11681a7
font_02_sfnt_off00011c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C53 18840 bytes
SHA-256: 185a79e7dfad9e926dc8fae687d0c5eb4498feaaad45f8bd933ba1fd24587eae

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