Malicious PDF — malware analysis report

Static analysis result for SHA-256 9355ed2fca0b4457…

MALICIOUS

PDF

73.3 KB Created: 2021-02-28 07:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 990f1fcb940a1bf59716da80e3320c53 SHA-1: 87c91bc5a5aa972602f7a52a0be38b9995f98e29 SHA-256: 9355ed2fca0b445731cce0e3574179e77481b155b6e01e9348a23f37c6536f42
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=what+is+60+000+in+standard+form In PDF document text
    • https://sifavebizibi.weebly.com/uploads/1/3/4/0/134040704/jumoba.pdfIn PDF document text
    • https://jaweditulopo.weebly.com/uploads/1/3/4/3/134313576/3026944.pdfIn PDF document text
    • http://zewenidasi.iblogger.org/88391835673.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/why_does_my_garage_door_open_but_not_close.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/zijatudanowi.pdfIn PDF document text
    • https://puwekuzegavezek.weebly.com/uploads/1/3/4/7/134734886/jatob.pdfIn PDF document text
    • http://kipokefurur.mygamesonline.org/3_types_of_services_ap_human_geography.pdfIn PDF document text
    • https://jijaxiwiruba.weebly.com/uploads/1/3/5/3/135333012/9356304.pdfIn PDF document text
    • http://kobivoweder.mypressonline.com/what_do_god_say_about_adultery.pdfIn PDF document text
    • http://xodinazafomizi.22web.org/administrao_hospitalar_livro.pdfIn PDF document text
    • http://rikororasikenek.iblogger.org/pozav.pdfIn PDF document text
    • https://xevekefipozi.weebly.com/uploads/1/3/1/4/131406281/35b133d9351b52.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ziwemasux.myartsonline.com/does_sat_physics_have_formula_sheet.pdfIn PDF document text
    • http://fotiworoz.epizy.com/apprise_form_a_sentence.pdfIn PDF document text
    • http://gabigirinekib.rf.gd/ratijeji.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_off0000e07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07B 5424 bytes
SHA-256: b19e8ad7203c557ec10eeb7b64e204e8d84ae97f16679f72be36a46ef8045a57
font_01_sfnt_off0000f2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C8 11264 bytes
SHA-256: 8d16904159682c38403e4c37d2294a35cf939e16cb5b8d8a6a3a7e411631b910