Malicious PDF — malware analysis report

Static analysis result for SHA-256 f473d7223f7fc478…

MALICIOUS

PDF

82.4 KB Created: 2021-06-03 00:49:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d300d1096405e6bdbe96a7a576c1cd3a SHA-1: 50aa0634e3d630d839d0e9e3ecb509129957ecc8 SHA-256: f473d7223f7fc478c0465d1fc3fe6b200e18e775fedcccd496949224b37475b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. One of the embedded URLs, https://ponafet.ru/123?utm_term=adam+a+zango+gambara, is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/123?utm_term=adam+a+zango+gambara PDF link annotation
    • https://fuxovibafisiboj.weebly.com/uploads/1/3/0/8/130874455/vilibipolizifux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_60b7f3f842609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459623/normal_5febeabacdc95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_60258bfeaadd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_604b48ae50e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404738/normal_606e2c746f1da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392877/normal_5fe9160471945.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449604/normal_5ff376a391eb8.pdfIn PDF document text
    • https://jazuwexakabe.weebly.com/uploads/1/3/2/3/132302764/rozefatififixu_zetegakerovik_dobotawe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456132/normal_5fce8c2836a1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_602444d2e5eb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0b136ec3-59be-4ea2-8f7a-2d9de67609df/how_to_install_graco_extend2fit_forward_facing_with_latch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0bec11-0acd-4c32-a4d9-c256f3bf7cf5/22058292924.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279f75b4-a59b-4214-a45d-fad2c2813b77/xerijorumosiboxagike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c41b596a-720f-4244-baa8-bf6b3e021725/common_literary_devices_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd8a6b05-28a8-4780-8038-33c20f30ffc3/8043507193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c82b769-fcb8-4d71-8411-95be9aa61ab3/what_are_the_themes_of_she_stoops_to_conquer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52dccb8d-b34d-496e-91ae-42d3b8f7b405/sibabenodopazozogokesunux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1cccfa-cb79-4d55-a0b7-626a9b2d5864/kifukevir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2689f60-ba89-4dce-84f5-f1db250aa3ab/intensive_pronouns_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9703f8-6d14-46a7-b52e-215a9a0c29d4/area_entre_curvas_integrales_ejercicios_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58b04df9-d105-43ca-a17a-cd099f51bf9d/38161097671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43515470-637a-4983-9be9-e5d53abb22aa/vapozoxe.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB7 4656 bytes
SHA-256: 9470b865f1a634327498bf8779cf50edde61a2e41ed4d5afecad4a2b5b044424
font_01_sfnt_off0000ea5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5B 10432 bytes
SHA-256: 4a03dd0d943bcebccf7e94d151a6dbd7c08e65c1e7e4799571319c3c2fcbcdf9
font_02_sfnt_off00010e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6C 18776 bytes
SHA-256: dabf0ccc451caf4864c9b22ca91318a92e8f625b469dd0561edf59b451c7a792
font_03_sfnt_off00012bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f