Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e34c440295f6bae…

MALICIOUS

PDF

90.4 KB Created: 2021-05-20 07:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1e08900c8bf26ec0193b18861155e697 SHA-1: 4dcd54d96a69cd2a439febf399cbf053f5df9ebe SHA-256: 5e34c440295f6baebd8e7e226edd81533328a915a938ec90e59b0161440104b8
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=soccer+spirits+seventh+star+episode+1+kissanime PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380080/normal_6044cf63cf07c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446923/normal_5fe35ddf8945a.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/sevejugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_606109ec40211.pdfIn PDF document text
    • https://webupusew.weebly.com/uploads/1/3/5/3/135344455/powexemuvofavatefona.pdfIn PDF document text
    • https://fogisitulen.weebly.com/uploads/1/3/0/7/130775537/7951f9bc6386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_604eafaae1b90.pdfIn PDF document text
    • https://kimewazokedusa.weebly.com/uploads/1/3/1/4/131454536/1209167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369308/normal_5fe1b36d27963.pdfIn PDF document text
    • https://lixepugoguzezum.weebly.com/uploads/1/3/4/1/134132265/tazovogapi.pdfIn PDF document text
    • https://nibawisid.weebly.com/uploads/1/3/1/0/131071209/1593171065bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368250/normal_5fcebd92cc127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484993/normal_5fc946a1a25c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_60123ba4da92b.pdfIn PDF document text
    • https://fugikoji.weebly.com/uploads/1/3/4/6/134611078/4674188.pdfIn PDF document text
    • https://piturerakilapes.weebly.com/uploads/1/3/0/7/130775197/cb57c.pdfIn PDF document text
    • https://vavuloxen.weebly.com/uploads/1/3/0/7/130738497/punigob-wopofabiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387698/normal_601b85f21b7bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a0c100-c629-4528-8703-292ee3ed3d7c/jibidenaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78fcc2a8-8c1a-4321-b819-4b0a26dce1cc/articulo_27_dela_constitucion_mexicana_resumen_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b282ea64-73fa-4e23-9935-eb0bdeb1ee49/jeverok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d675994-9811-4cff-ac88-606fa697801e/how_to_reset_samsung_sdr-b74301n.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24f5b45b-7b9e-4300-8be1-08b1102ee49c/rain_bird_lnk_wifi_module_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b7fa0bc-d9a9-41b5-88bf-a1583ae03246/mens_health_training_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d815be-315e-4589-92c4-6c8f72fa6f61/12322441079.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_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 3136 bytes
SHA-256: 6487091c0070741e646db4a1cda49bb5dd8928231115cd9838b724a369c8679e
font_01_sfnt_off0001074d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074D 5560 bytes
SHA-256: 457858691b3d5e99a0917414811a55ac6213b81218d3bf0d59ecf406479b56e9
font_02_sfnt_off00011a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A18 15300 bytes
SHA-256: 6dd4ae0aaa098738e814d6edcffd7ce5bcbad7387cbb496801f70c238a729ac7
font_03_sfnt_off000145e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145E6 16116 bytes
SHA-256: acdc7345fd7c724e0f83f99756c334a81566d7f1ced1780f830934d9e28cbf4f