Malicious PDF — malware analysis report

Static analysis result for SHA-256 126fbb4b2095cc58…

MALICIOUS

PDF

82.8 KB Created: 2020-11-11 02:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 26691fa3bc326ed8b74900a3617adce8 SHA-1: 2ad58a08ad0552a0a91fc22e4441c378a26680f0 SHA-256: 126fbb4b2095cc58e842e1728514c249f0927f8748c85ca2bacccd9908d7b5c8
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://cctraff.ru/aws?keyword=notario+publico+services+bucerias, which is part of a link farm. ClamAV also detected this file as Pdf.Phishing.Trojan, indicating a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/aws?keyword=notario+publico+services+bucerias In PDF document text
    • https://rolewexuvuviwu.weebly.com/uploads/1/3/4/7/134742390/ddb0910.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/tigasi-mofijasudinulox-besegixarexisos-dimenuv.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/midaguvimabof/outlaw_paintball_pflugerville_address.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/a_night_to_remember_walter_lord.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/como_aprender_a_tocar_guitarra_desde_cero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19346a20-12b1-40be-96f3-d36df997a81d/guion_de_pastorela_comica_la_cartita_completa.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/24850690846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e2cebcf-b107-4178-8feb-de3c4c657212/difumefuveroxaka.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/97825735864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2854831a-ada2-4675-b6fb-0ce37b9f7f18/50307013257.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/rafixulebixa.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/keranuxuketekosejuzozegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6a16572-12a8-4f18-a124-a4cdc15b344d/kaxitovizojetetoxiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/thrive_conference_2020_california.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_off000107e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E1 5096 bytes
SHA-256: c0806d4a0681854dad05e4beb7c79a81148c4ea7f26e3340eebeb6c14758f5cf
font_01_sfnt_off0001194e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194E 10800 bytes
SHA-256: 4840d914d04bd2b56e8731cd84351a6c66c9c6e89d209ae1546491388a51f801

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