Malicious PDF — malware analysis report

Static analysis result for SHA-256 02480c3683eb3e05…

MALICIOUS

PDF

68.7 KB Created: 2021-02-18 15:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 397345a4a226805f40382379e42181e6 SHA-1: d12aaa22e535da95cfd7a960c5ca1a771daef2c1 SHA-256: 02480c3683eb3e05500572b576612f6f241088dc247c91dda6c99d4807359992
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. One prominent URL, https://maypoin.ru/aws?utm_term=introduction+to+italian+public+law+pdf+download, appears to be part of this redirection scheme. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly indicates a malicious intent to distribute or phish via these links.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://maypoin.ru/aws?utm_term=introduction+to+italian+public+law+pdf+download PDF link annotation
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/gomavikurad_vikomaditun_xejiwakigi_naxelotu.pdfIn PDF document text
    • http://0fruit.space/rekaximutejijemikikodazugml2n7.pdfIn PDF document text
    • http://bridgecommerce.com/64561743629rqtem.pdfIn PDF document text
    • https://cdn.sqhk.co/tatidukigag/jjbidic/ryan_myclassboard_app.pdfIn PDF document text
    • http://xigegojaliku.iblogger.org/how_to_insert_appendix_in_apa_format.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/jijukixefezotubipix.pdfIn PDF document text
    • https://sowidokobixu.weebly.com/uploads/1/3/1/8/131856306/adb371317512a1e.pdfIn PDF document text
    • https://wetebofi.weebly.com/uploads/1/3/1/6/131608016/fufovori-dipamajajez.pdfIn PDF document text
    • https://gafapelisepofas.weebly.com/uploads/1/3/4/7/134762307/e2a2a51172f09.pdfIn PDF document text
    • https://tezijiso.weebly.com/uploads/1/3/4/6/134690371/riwobodepemawanisem.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/wutilavosetedoxef.pdfIn PDF document text
    • http://futup.ru/antarctic_ice_sheet_massx1n45.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://barirenuvekesup.epizy.com/mefibifazanape.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/napilulufevobifewi.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/update_android_9_apk.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/rupegamemularozitutiwi.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_off0000c374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC374 4904 bytes
SHA-256: 68f3da1c6586ca4cd001d894e0cdc927cba36a43d3a47257fcf0e0974d7847ae
font_01_sfnt_off0000d42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42C 10424 bytes
SHA-256: c87a733b598a1d8d470047c71cde84426d4b4fc4eb0f39e16645f989112d4fc7
font_02_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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