Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae2a9186959a6a8…

MALICIOUS

PDF

78.5 KB Created: 2021-03-15 09:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e8be5457ecfeeeff1fba915c62bf83ab SHA-1: 3e5b96ad0db9e9091489a88c9fd6fe25a7de2540 SHA-256: 6ae2a9186959a6a809c85813d742bea8b3dcc7f12ad76f368808cfd838e18b48
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs and the document's structure indicate an attempt to redirect users to potentially malicious content, likely for SEO manipulation or to deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/wix?keyword=illustrated+guide+to+the+national+electrical+code+8th+edition+pdf PDF link annotation
    • https://cdn.sqhk.co/bemememu/hgjbuij/hit_them_all_mp3_download.pdfIn PDF document text
    • https://zosujugopaw.weebly.com/uploads/1/3/4/5/134509911/3276960.pdfIn PDF document text
    • https://cdn.sqhk.co/woledibiroju/hcjhibV/lowak.pdfIn PDF document text
    • https://vidijizuv.weebly.com/uploads/1/3/0/7/130776341/pavuson.pdfIn PDF document text
    • https://cdn.sqhk.co/subetudagoli/jaqhdij/lamifowu.pdfIn PDF document text
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/vanid.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/1038077.pdfIn PDF document text
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/bazom.pdfIn PDF document text
    • https://detudonerud.weebly.com/uploads/1/3/4/6/134660859/wogejekazusi.pdfIn PDF document text
    • https://cdn.sqhk.co/vukobefebu/KjftigH/16829753394.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/Nn6phg8/85061688444.pdfIn PDF document text
    • http://tolagipifumer.iblogger.org/synthesis_of_purines_and_pyrimidines.pdfIn PDF document text
    • https://luxituwane.weebly.com/uploads/1/3/1/8/131859527/e6234e485fd0.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/I4giqgd/42845814471.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/pibajuwi/nuzevutatulijogivolijedo.pdfIn PDF document text
    • http://nabiderafiwo.epizy.com/al_quran_bangla_islamic_foundation.pdfIn PDF document text
    • http://jabisuluro.epizy.com/54077717458.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/4462412061.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/kisumizegoje.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/rojawutujibikatatojilen.pdfIn PDF document text
    • http://fijijap.rf.gd/mokanujobaj.pdfIn PDF document text
    • http://temomuduzuba.epizy.com/combination_syndrome_in_prosthodontics.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2B 5548 bytes
SHA-256: aba72d88d1b9f0a8f373cf8396307ac8f6a29185e21db71fe17e37e1a2d7e3d8
font_01_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 11392 bytes
SHA-256: 77e1f959c08eb85ab6f809c34e85c942debcee6ff0c3f67344ccff121e4413ec
font_02_sfnt_off000116f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F3 16084 bytes
SHA-256: 6049f7be1eb58524b2bfe5e0ab34f4300347f26dbb23ab6ad605e3b0d5647553