Malicious PDF — malware analysis report

Static analysis result for SHA-256 35322decd355bb03…

MALICIOUS

PDF

69.5 KB Created: 2021-02-24 15:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 22b8cf8177501d010babb7217ca44210 SHA-1: 79a9ea830266c89468c03bf3cdd9362b4f2da585 SHA-256: 35322decd355bb039df249aa1833c3e2ffc53439f5c09be785b992fb269bf288
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=d%25C3%25ADas+feriados+federales+en+puerto+rico+2020 In PDF document text
    • https://wigadanoj.weebly.com/uploads/1/3/4/4/134404864/teren-malegar-tuwinumukidasif.pdfIn PDF document text
    • http://jejobuxamemas.22web.org/listen_offline_on_android.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/nokowolawolivadavunawefi.pdfIn PDF document text
    • https://dalenorilesa.weebly.com/uploads/1/3/4/8/134858788/7746861.pdfIn PDF document text
    • https://zokefipevi.weebly.com/uploads/1/3/4/3/134311683/zexib.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/best_books_to_learn_about_american_politics.pdfIn PDF document text
    • https://daxokubazab.weebly.com/uploads/1/3/1/4/131406800/kivedatafizi.pdfIn PDF document text
    • http://detonic-ro.website/pukolobufeduzomj.pdfIn PDF document text
    • http://slamelina.website/7156696840888ln5.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/31553488872.pdfIn PDF document text
    • https://tomoderupa.weebly.com/uploads/1/3/4/0/134042314/mipus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wedagavuvux.epizy.com/fesogef.pdfIn PDF document text
    • http://penalat.rf.gd/basic_english_assessment_test.pdfIn PDF document text
    • http://gavuzolu.epizy.com/ultimate_boot_cd_windows_7_iso.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_off0000d02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02F 5476 bytes
SHA-256: da44816278c0c50360a3313619494aa2645427a330c32e6ef3a8a652e417e407
font_01_sfnt_off0000e2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EE 11160 bytes
SHA-256: c36d103b608f65a0e9e19992fbbc74bf674be1b55eca3047f4ff8b090dd0ac47