Malicious PDF — malware analysis report

Static analysis result for SHA-256 a62fe44e05f327c5…

MALICIOUS

PDF

68.5 KB Created: 2021-04-03 07:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 63e61fb3b68b33a93307172d99c41807 SHA-1: d41d6c4d71fd46787c654b68ff26026b748be4cb SHA-256: a62fe44e05f327c5594b60a2536a5169e6df9cef787ba09b14a8773b6aec6472
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, https://maypoin.ru/123?utm_term=itns+281+challan+in+word+format, is suspicious and likely used to direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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/123?utm_term=itns+281+challan+in+word+format PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452374/normal_600e22240bd47.pdfIn PDF document text
    • https://leximefowa.weebly.com/uploads/1/3/2/6/132680903/tupefu-togekewi-sodeseg-sototoropebix.pdfIn PDF document text
    • http://fekosuse.getenjoyment.net/xafusogigakuritubepunit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474739/normal_5ff93e255c42e.pdfIn PDF document text
    • https://lulotabo.weebly.com/uploads/1/3/4/7/134745182/580dbe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_605d73e4d48e4.pdfIn PDF document text
    • https://bilemupu.weebly.com/uploads/1/3/4/6/134654663/6447908.pdfIn PDF document text
    • https://kuwugexikoxol.weebly.com/uploads/1/3/4/7/134718068/wugogup.pdfIn PDF document text
    • https://xasozabeze.weebly.com/uploads/1/3/4/5/134501754/4138965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_604b1fc162664.pdfIn PDF document text
    • http://purubifo.medianewsonline.com/vapuni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407784/normal_602b96ee4d8a2.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/dotivaf/chale_aana_pagalworld._io.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/how_to_get_free_shipping_victoria_secret_canada.pdfIn PDF document text
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_8b01d469c88747b38857900dec23efa0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/pagedoravevikazijibokaw.pdfIn PDF document text
    • http://nojititama.epizy.com/naomi_junichiro_tanizaki_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/52940129843.pdfIn PDF document text
    • http://buzuvemujogumob.epizy.com/dell_poweredge_r730_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/xulaxezanituzusavopapan.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_2f26c823baf34631850ed952d1698fed.pdf?index=trueIn PDF document text
    • https://63209029-b609-4f89-80e5-af59b408cdb4.filesusr.com/ugd/0713e6_9bef9d5d498c4269bc9c4c82b3ce8d10.pdf?index=trueIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_786821a8a953463389944a8bd4b5c757.pdf?index=trueIn 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_off0000ce3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE3F 5668 bytes
SHA-256: 541ef96093a754a3467b366d02e8f47da29c4fae7bd87232078df9161135e0b4
font_01_sfnt_off0000e176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE176 10236 bytes
SHA-256: dcb6d6ed69648e0f28c2b55cf7bd799863b4bf66690061e8a1a923f530898224

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