Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac53552280ec2eaf…

MALICIOUS

PDF

80.6 KB Created: 2021-02-02 20:34:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ecbb17d7b37dea8dd05b089ffcf67b56 SHA-1: bd1713e08dcdf8ac9162889883a433526351b232 SHA-256: ac53552280ec2eaf955c62ada6e11f654bb872fbb47a878a0c50b039bc8fda54
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/aws?utm_term=employee+engagement+survey+template+free In PDF document text
    • http://vodabezoli.iblogger.org/lejutuwijolabafup.pdfIn PDF document text
    • http://vuwavutos.iblogger.org/revirivo.pdfIn PDF document text
    • http://itasummer.fun/the_travels_of_marco_polo_the_venetiansj9ai.pdfIn PDF document text
    • http://igme.site/fezevezaweradakoruduzedezue5e8.pdfIn PDF document text
    • http://bebodepana.22web.org/xuwijiramusimiguviba.pdfIn PDF document text
    • http://3gusevshop.space/15505576206jzdoy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406812/normal_5fe2d085dfd16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuwovedivaz.rf.gd/dr_martens_size_guide_shoes.pdfIn PDF document text
    • http://fufagagebo.epizy.com/rotojonape.pdfIn PDF document text
    • http://jigujirew.epizy.com/girutinoxipatalegukuzo.pdfIn PDF document text
    • http://tarefipiv.rf.gd/20305411430.pdfIn PDF document text
    • http://keputeka.epizy.com/keystroke_logger_for_android_apk.pdfIn PDF document text
    • http://runapibiledudej.rf.gd/tuning_ukulele_senar_4.pdfIn PDF document text
    • http://zunizififuve.epizy.com/excel_template_personal_budget.pdfIn PDF document text
    • http://titarejidawe.epizy.com/android_16_17_18_dragon_ball_z.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_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 5340 bytes
SHA-256: 72af98c4a2512036a45d5f05d10f5f559a0d30e3e2cb1c79dae9d07a89b553a0
font_01_sfnt_off00010ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECE 11304 bytes
SHA-256: 1ff14eaa0bd127316ede6983e95816a36b8af6089b09615a39776b17906c9d83