Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd28ac016298a6e…

MALICIOUS

PDF

74.4 KB Created: 2021-03-30 02:41:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c2db76fdc4caabbf4e6c10cb9339bec2 SHA-1: 735d4363469f05f71bb4f69f105ef0fec898e14b SHA-256: ebd28ac016298a6e2455f4811a9a113242e1871aae390fdf104deb19617a1f4f
214 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate this is a malicious PDF designed to redirect users to harmful sites, likely for phishing or malware distribution. No scripts were extracted, but the primary attack vector appears to be the extensive link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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/strik?utm_term=what+size+blade+for+craftsman+10+bandsaw In PDF document text
    • https://dawujorukola.weebly.com/uploads/1/3/4/6/134683436/1611a87cde.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/wixosukidubazape.pdfIn PDF document text
    • https://pivamaxisogen.weebly.com/uploads/1/3/4/4/134481881/dufexezeduwexojoli.pdfIn PDF document text
    • https://fokutape.weebly.com/uploads/1/3/2/8/132814024/3c01c82ba.pdfIn PDF document text
    • https://tevaxuxelajuri.weebly.com/uploads/1/3/2/7/132712575/e16a597.pdfIn PDF document text
    • https://dudefusuze.weebly.com/uploads/1/3/4/6/134628774/4490526.pdfIn PDF document text
    • http://bijivarudigodig.iblogger.org/62283376388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485451/normal_605679f839704.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5fe5e82883fae.pdfIn PDF document text
    • https://xamukujivova.weebly.com/uploads/1/3/1/3/131384573/08871211c69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_60176e39cf3f7.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/nitatotol/vidagusubetupagomuvabuvi.pdfIn PDF document text
    • http://tedusola.epizy.com/fitbit_charge_3_swimming_heart_rate.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/justinguitar_beginners_songbook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/45214128798.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/dofobepuxupij.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/6840091322.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/gorotujalitixej.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/rivusovelipujit.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/98772028643.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/xapaduxududadobetafumale.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/gapegovinizisemajisa.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_off0000e565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE565 5752 bytes
SHA-256: e7e0eb8ae1ed9850fd6c0964172ec7c92b9092c2bb26ccfd84b61ea6f03be83e
font_01_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 10316 bytes
SHA-256: 6a5844782d4cf511450139f7ea78c17449aefc9b1a6c5c070113f88a0dc42e91

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