Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d2f75f2736edcb…

MALICIOUS

PDF

72.0 KB Created: 2021-02-15 03:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b1dbc2ec2847295b1d959697d2464cea SHA-1: 6bd566e8d1dacb77445c74d4242323427e69de4a SHA-256: 59d2f75f2736edcb132d9159df0eceb805033f366498c1b29fee2cdd6eabf147
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=writing+chemical+formulas+ionic+compounds+worksheet In PDF document text
    • https://static.s123-cdn-static.com/uploads/4469106/normal_5ff9fab40223b.pdfIn PDF document text
    • http://lessonsonline.site/570773374722likl.pdfIn PDF document text
    • http://uscreditmonitoring.info/ite_checkpoint_exam_answers_20178ufg2.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/7108777.pdfIn PDF document text
    • https://cdn.sqhk.co/bozutebux/hhRjdQL/bamboo_looking_paper_plates.pdfIn PDF document text
    • https://cdn.sqhk.co/gesimefav/giUIib0/denawawuredewavarodera.pdfIn PDF document text
    • http://testertumentum.space/blue_devils_2017_snare_break_sheet_musicy6x7o.pdfIn PDF document text
    • http://regvoolkim.website/98496083993ymbjf.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/gs9jgjf/milarisapezeg.pdfIn PDF document text
    • http://zabogena.iblogger.org/evaporative_cooling_sizing_guide.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/ca1325.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/4766464294740ln2.pdfIn PDF document text
    • https://toxofeleziwogiz.weebly.com/uploads/1/3/1/4/131406173/tezuwejat.pdfIn PDF document text
    • http://tajumizigareni.iblogger.org/criminal_case_pacific_bay_mod_apk_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rimutapewite.rf.gd/vamul.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_off0000dc70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC70 5736 bytes
SHA-256: 38837216d507f0fb5dcc96c77b268132b4b9beed11b4bb9d9b39b956698128c0
font_01_sfnt_off0000efec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEC 10320 bytes
SHA-256: ee246770cf82177a5f961efceb0f10787afdbe7515b243aeaf3586b0ce387eef