Malicious PDF — malware analysis report

Static analysis result for SHA-256 35870a812ca4d801…

MALICIOUS

PDF

72.3 KB Created: 2021-02-27 21:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3972b18031ef7580bdc80c7f14b7c95e SHA-1: b7ca663861c873f658bb557cff7654b3d417a4c4 SHA-256: 35870a812ca4d801fc83e976dc6e00cb753dcac6e941b51811f4b51d4f2c6504
304 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://narusipanunajix.weebly.com/uploads/1/3/1/0/131069819/6086066.pdf.
  • 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://dafemum.ru/aws?utm_term=garmin+nuvi+255w+software+update In PDF document text
    • https://narusipanunajix.weebly.com/uploads/1/3/1/0/131069819/6086066.pdfIn PDF document text
    • http://wiwuwanulujero.iblogger.org/wrong_turn_2003_dual_audio_720p.pdfIn PDF document text
    • http://wapajojakazewi.iblogger.org/byomkesh_o_agniban_full_movie_link.pdfIn PDF document text
    • https://sozefusezat.weebly.com/uploads/1/3/4/8/134860931/f1d6c0f.pdfIn PDF document text
    • https://mitapesazo.weebly.com/uploads/1/3/4/6/134652839/5c3f8c8ad5382cb.pdfIn PDF document text
    • https://balevowoperat.weebly.com/uploads/1/3/1/3/131397989/wemomowanopuwom.pdfIn PDF document text
    • https://puvomowaja.weebly.com/uploads/1/3/4/3/134318832/1388100.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/3JgdGjf/63818263561.pdfIn PDF document text
    • https://tuzutetenufiro.weebly.com/uploads/1/3/4/7/134716615/9241211.pdfIn PDF document text
    • http://lemixop.iblogger.org/alage_alage_full_video_song.pdfIn PDF document text
    • https://babotiditufo.weebly.com/uploads/1/3/4/6/134694550/02a3e83135e3.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/1jcHfXK/zuzixemokesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekafoweratum.epizy.com/caller_id_faker_iphone_free.pdfIn PDF document text
    • http://mevomum.epizy.com/7383735363.pdfIn PDF document text
    • http://zefixufedinokas.epizy.com/97936796225.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_off0000ddf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF9 5592 bytes
SHA-256: 504a4309711428f385716e290a41bce4970728e1ccfb1a914ce508fe79eb71f6
font_01_sfnt_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 10428 bytes
SHA-256: 3b94413844bcdfed0a4fe2844c3812f539104f7ceebbae2a7b6f3d7a5b5c72e4