Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4df70ea222b7c3…

MALICIOUS

PDF

77.6 KB Created: 2021-02-11 13:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4e7287763a82801fb743f174a220a34e SHA-1: 6e6e7752877078dbab26276eb4a36e3dab4ce902 SHA-256: ca4df70ea222b7c30f40c04e13f8001b39af50ead8f990c34a89ba1146fba46f
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/wb?keyword=unconformities%20in%20geology In PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5ffa2bc355fc9.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/ft5ejjz/puzzle_box_all_levels.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374980/normal_5feea3424c8f5.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/ibGehe3/empire_millennium_wars_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/pivatiwon/igjgJib/redbubble_phone_case_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392462/normal_5fca41f9ccc1a.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/8bDkicf/19627215676.pdfIn PDF document text
    • http://xevamaz.iblogger.org/barbie_doll_couple_images.pdfIn PDF document text
    • http://mekozeka.66ghz.com/76212129036.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/byjbjdz/pakistan_call_free_internet_mobile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413113/normal_601d73f99669f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejemerane.epizy.com/idsa_prosthetic_valve_endocarditis_guidelines.pdfIn PDF document text
    • http://jedalavupu.epizy.com/60875936319.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/codepipeline_cloudformation_template_configuration.pdfIn PDF document text
    • http://vopipewulowapa.rf.gd/wiwafositibi.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_off0000f40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40F 5084 bytes
SHA-256: 6163b5d2de2e6705b71294c85026dce8a15bc138ff7931d2dc672b3ae2362a84
font_01_sfnt_off00010556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10556 10936 bytes
SHA-256: 62c6fde10d0e32062eecc7d1e5dfbdc9c911014e18020dc6995f5a443f78336f