Malicious PDF — malware analysis report

Static analysis result for SHA-256 7890a71b9150929c…

MALICIOUS

PDF

70.9 KB Created: 2021-03-06 14:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4291b4a5d4cda2dc6ede0ea24c0f585d SHA-1: 64d20396403ac3b6207634d321bd67179b0b38a6 SHA-256: 7890a71b9150929c6b65ee582399f6450e50ac19b9b3e3edc5491a67afa276c4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=dynaco+st+70+service+manual In PDF document text
    • http://avto-trokot.xyz/55125759352uyq7.pdfIn PDF document text
    • http://theharaka.online/bidivozibojobogoloxigarux6mxl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389801/normal_602e99416a0e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464301/normal_60243a87b3709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5fc752d0e3cf2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367938/normal_5ff1c7c247b73.pdfIn PDF document text
    • http://phillipen.online/rugomuxerenuxademolos9ler.pdfIn PDF document text
    • http://glasshookahcatering.com/descargar_diccionario_larousse_en_espaol_gratis3kt54.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496204/normal_5fc80bf5da085.pdfIn PDF document text
    • http://myshoes.moscow/el_evangelio_apcrifo_de_mara_magdalenamnbgf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472475/normal_60413f7840e57.pdfIn PDF document text
    • http://martakkord.ru/zavemisanmjw7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465538/normal_5fe91d7eaf6dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403121/normal_6007392f616dd.pdfIn PDF document text
    • http://pumba.fun/descargar_whatsapp_web_apk_para_androido4gsy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_603906b14b9f0.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/a2dc2fe1-de8e-4469-b2d7-204ce75bb9d0/java_software_structures_lewis_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20e07be2-c69e-4765-a416-7970aea86003/what_is_process_control_in_system_call.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f76a02-19cb-4cd6-b23b-8eec75708610/what_is_hue_saturation_and_luminance_in_lightroom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8ca1c5-ce39-4ac9-bcfd-3316639394eb/past_simple_vs_present_perfect_esl_activities.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47B 5328 bytes
SHA-256: c9ca863f9a55bb4a6b19b2c53e6e9e8ce887f591b6cba288a958d6b475db1175
font_01_sfnt_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 12940 bytes
SHA-256: 9122ceccb1c80f05a07308a0ffb8862a37b4b48b1e103a7067655748cf97068e