Malicious PDF — malware analysis report

Static analysis result for SHA-256 671ede5e6752cf39…

MALICIOUS

PDF

72.8 KB Created: 2021-02-11 20:00:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 35cbf000d0b00cdf105905695ac01e72 SHA-1: d48ab1312a5ac059ea8ca8c5ae27a30733cbecac SHA-256: 671ede5e6752cf392284953773b643af972d582d82a52a945771d92681a19892
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=la+comida+worksheet+spanish In PDF document text
    • https://xaxuxogupovugid.weebly.com/uploads/1/3/0/8/130874119/afe0a9301947a.pdfIn PDF document text
    • https://sibozigoguxo.weebly.com/uploads/1/3/0/9/130969143/koxomodavu.pdfIn PDF document text
    • http://tapabafana.22web.org/emulator_android_untuk_linux_mint.pdfIn PDF document text
    • http://nefusetas.iblogger.org/11995306642.pdfIn PDF document text
    • https://nuzaxegef.weebly.com/uploads/1/3/4/8/134857273/193098.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416932/normal_5fcb9f0ae042c.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/zuxopufototeiorq6.pdfIn PDF document text
    • http://ribavezotirenez.22web.org/in_on_under_worksheet_for_nursery.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/3924424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389095/normal_60078395f3c7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daroxexu.rf.gd/yahoo_answer_le_domande_pi_assurde.pdfIn PDF document text
    • http://femixuduj.rf.gd/intensive_care_society_guidelines_organ_donation.pdfIn PDF document text
    • http://nawugem.epizy.com/sobebopetekaluzadovugefi.pdfIn PDF document text
    • http://nipimixo.epizy.com/pathfinder_alchemist_guide.pdfIn PDF document text
    • http://kejidexod.epizy.com/exam_master_may_2018.pdfIn PDF document text
    • http://nobitinajed.epizy.com/convert_to_excel_using_apache_poi.pdfIn PDF document text
    • http://lusiromipu.epizy.com/guia_ceneval_exani_ii_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75A 5380 bytes
SHA-256: fc88f614a7d41b6176fd8110105383cf94521b6e4075da24f6ca3ca3651e514a
font_01_sfnt_off0000e988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE988 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000f216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF216 10556 bytes
SHA-256: 62ee66130395676a8d885bdee6c56a5eb0a12dd62c109f64e436c27596f0a1e0