Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba9b0ef7a066e83…

MALICIOUS

PDF

56.6 KB Created: 2020-03-22 13:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: 5ba90f2bbbd5cc8c649446ffe49dfca6 SHA-1: 014276c6903ee54dc66f7266902af371d447e91f SHA-256: 3ba9b0ef7a066e8340a16caecb77aacf220442b69ab86b2a9f83a6197c88c0ef
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, indicative of a link farm or SEO manipulation tactic. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. While no scripts were extracted, the sheer volume of outbound links suggests an attempt to drive traffic to potentially malicious or compromised websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://kindspa.com/uploads/1/3/0/6/130621663/130621663.html#potencial+de+frenado+efecto+fotoel%C3%A9ctrico PDF link annotation
    • http://topdesigndrivesandpatios.com/uploads/1/3/0/5/130589056/tufibipakatu.pdfIn PDF document text
    • http://secondlifelamps.com/uploads/1/3/0/6/130605238/linasis_warolubif_sowudifadoragus_ligugumexutejem.pdfIn PDF document text
    • http://amlboutique.com/uploads/1/3/0/2/130289341/52f0102.pdfIn PDF document text
    • http://keysforkidsfoundation.com/uploads/1/3/0/5/130588279/7c5bf0.pdfIn PDF document text
    • http://horusmedsupplies.com/uploads/1/3/0/6/130604631/lujuve.pdfIn PDF document text
    • http://www.teszeri.com/uploads/1/3/0/5/130542829/kimovum.pdfIn PDF document text
    • http://weldersbrand.com/uploads/1/3/0/7/130738912/ea4235eb50f81a.pdfIn PDF document text
    • http://namelesstea.com/uploads/1/3/0/4/130488621/veruvifot-dipuzu-setafe.pdfIn PDF document text
    • http://thinkbuildthink.com/uploads/1/3/0/5/130550995/3379922.pdfIn PDF document text
    • http://www.carbossblogs.com/uploads/1/3/0/7/130775164/4709423.pdfIn PDF document text
    • http://hostmaster.albhof-heidental.de/uploads/1/3/0/7/130738531/gejilubime.pdfIn PDF document text
    • http://princess-crochet-boutique.com/uploads/1/3/0/8/130814902/3401163.pdfIn PDF document text
    • http://dodiesplacecharities.org/uploads/1/3/0/7/130775950/doxulokabu_paguxamazafi_jewejezegusidu.pdfIn PDF document text
    • http://eurowellnessparade.com/uploads/1/3/0/6/130620633/dinusemo-xewikorav.pdfIn PDF document text
    • http://it-scc.com/uploads/1/3/0/6/130620991/pefidarukufupajovuv.pdfIn PDF document text
    • http://cbacreditcard.com/uploads/1/3/0/6/130621457/1995413.pdfIn PDF document text
    • http://www.cookiesandcrystals.com/uploads/1/3/1/0/131070171/bedemabem.pdfIn PDF document text
    • http://hazelandhoney.ca/uploads/1/3/1/0/131070979/2607444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn 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_off00008dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DC8 9060 bytes
SHA-256: 804da3fe193019a8145a90e2bbf0c0c82cd8fafbacf7b532dc29e861392c7c24
font_01_sfnt_off0000af06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF06 3652 bytes
SHA-256: 95f9a12b8b17a9fd453fe66d72c73e7f4a90cce4d6ddb2bf14623106aa4b5322
font_02_sfnt_off0000bbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBE 16288 bytes
SHA-256: fe7e72872bdb93dc3d1bd0a9fba9b9e7ab1a939164cea08afe3bccf7cca7b2b2