Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23f54328013220c…

MALICIOUS

PDF

73.2 KB Created: 2021-02-03 03:17:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1aaaae456fe17ee8c34699f5b555ee60 SHA-1: 8400e15759766d8a5767fd9c76792b17eb1c025d SHA-256: a23f54328013220c3b484166f238304d7401444b6dc6e3dd5f2a947f08000230
196 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
  • 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.
  • 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://seumenha.ru/aws?utm_term=s+letter+whatsapp+status+tamil+video PDF link annotation
    • http://losiruwu.66ghz.com/path_traversal_attack_cheat_sheet.pdfIn PDF document text
    • https://binigikuvoloxog.weebly.com/uploads/1/3/5/3/135332024/wadudi.pdfIn PDF document text
    • https://cdn.sqhk.co/zipuzedozame/j9s2jb2/20860644528.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/zodofukibula.pdfIn PDF document text
    • https://duvozogol.weebly.com/uploads/1/3/5/3/135314926/safaz.pdfIn PDF document text
    • https://tunuzari.weebly.com/uploads/1/3/4/3/134316111/0b01e2541.pdfIn PDF document text
    • https://siwevobone.weebly.com/uploads/1/3/5/3/135317475/bifugujot_juweta.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/fWdidij/like_father_like_son_sayings.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/boduxatavepe/react_bootstrap_form_email_validation.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/jofazotilagalezot.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/abbottabad_university_date_sheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/38567341496.pdfIn PDF document text
    • http://katudajug.epizy.com/73413416256.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/the_billings_method_book.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/begumititawe.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_off0000e078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE078 5456 bytes
SHA-256: 51a0c5ae95f909b03ed9f0a0ce52ab4315be28c7be93e1fb919afb0df8d6f198
font_01_sfnt_off0000f2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EA 10912 bytes
SHA-256: 9aa2a4f8ea893f291d26d03fcbc9f6be0be07d351e5a931ef82a9c16c66890c5