Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2baf52832dc049…

MALICIOUS

PDF

72.6 KB Created: 2021-02-12 19:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8cd3391af285c32bfa0b76b896e2840a SHA-1: 224bb312e9196d399942ecc1202d9fcb495d371e SHA-256: 5a2baf52832dc04933c0894514b317c4ee749e42a2f55c7bf3e41f396f2fb3a0
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=relion+thermometer+walmart In PDF document text
    • http://efarbok.xyz/6682045247673476.pdfIn PDF document text
    • http://lofokumado.22web.org/interesting_facts_quiz_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/dijadive/sIijmig/dosomuvivovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_6009c4b1cd252.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizajo/ghs0Bge/zedge_app_download_for_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_600aea1617a78.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417123/normal_5fcf3c0b18974.pdfIn PDF document text
    • http://dasopifumos.iblogger.org/41709066444.pdfIn PDF document text
    • http://malapiwo.66ghz.com/chef_s_choice_food_slicer_manual.pdfIn PDF document text
    • https://tirusagoxavux.weebly.com/uploads/1/3/5/3/135329940/kevaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fawepajemug.rf.gd/love_of_my_life_sheet_music_easy.pdfIn PDF document text
    • http://jemibare.epizy.com/wpf_itemscontrol_template_binding.pdfIn PDF document text
    • http://sobovag.rf.gd/zevinuxav.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_off0000df28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 4848 bytes
SHA-256: 871a44c0fa07a821f54cb0347d8fea245374795788bb04efcb4b547c00bc9021
font_01_sfnt_off0000ef83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF83 10676 bytes
SHA-256: 563d26899136d5983ebe063ec2abb5242686463d81ea3e38c3ba2758f58dfc30