Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da134fc4fcc0955…

MALICIOUS

PDF

68.1 KB Created: 2021-01-26 10:15:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0f062cf79335abca3154f42556630833 SHA-1: 5cfe806bfc7eedeabd8596abd7825ac0dc6bda74 SHA-256: 3da134fc4fcc0955b558ced6c263c16d09aa792321eee7feff2d07021df47180
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/123?utm_term=bakery+story+hack+apk In PDF document text
    • http://autolombardpro.ru/border_patrol_agent_arrested_in_tucsonkhhn2.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/jomitodakodif_latilezoxopadi_towuvibabafe.pdfIn PDF document text
    • http://nasporte1.fun/pokemon_pixel_character_creatoroibdg.pdfIn PDF document text
    • http://meetchat.space/xanariqonoi.pdfIn PDF document text
    • http://wonnaturila.space/ultimate_r1_mod_apk_revdlg5kso.pdfIn PDF document text
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/d56dbf6f3.pdfIn PDF document text
    • http://agnewjacobs.com/37375941188d5sb7.pdfIn PDF document text
    • https://sovejugi.weebly.com/uploads/1/3/4/6/134652237/fagifapanori.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukajevo/medicamento_cloridrato_de_metformina_para_que_serve.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/sixth_grade_vocabulary_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/wobog.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/jezadiwuxiwexunep.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/wibukimalovebabe.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/14464445950.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/ejercicios_de_enlace_ionico_resueltos.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_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 5204 bytes
SHA-256: e3b9140630bb4c01536e61e6c2dde328281ab9613423c5617e2a994ada6905db
font_01_sfnt_off0000e284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE284 9872 bytes
SHA-256: 3f67f819ea25a22be68392744c8c0877027835b182eb5b9d159a3fbe5ae39717