Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fbf5049ba1cebe…

MALICIOUS

PDF

71.4 KB Created: 2021-01-23 00:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 93e17350f6a7aaaec607fc906b5a8a85 SHA-1: 060d23fbe34e2fe99e8fba5e14a5777d67a19f89 SHA-256: a1fbf5049ba1cebeaf1863f52ac9c485677ae81f663329d3fa92f07fe89f54c9
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. The document body, though heavily obfuscated, suggests a pretext of providing a 'Bohm bluetooth headphones manual'. The presence of numerous external links, including one to 'maypoin.ru', indicates a likely attempt to redirect users to malicious sites or download further payloads. No scripts were extracted, but the PDF structure and numerous external links are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/aws?utm_term=bohm+bluetooth+headphones+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471275/normal_6002c7e292aca.pdfIn PDF document text
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/6a7e5639.pdfIn PDF document text
    • https://pisixaxonazav.weebly.com/uploads/1/3/5/3/135394173/6720268.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445541/normal_60067f33c0e5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fd6ed5464bf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458417/normal_5fcaf6161854a.pdfIn PDF document text
    • https://kekisadubivef.weebly.com/uploads/1/3/3/9/133986731/4443201.pdfIn PDF document text
    • https://site-1176114.mozfiles.com/files/1176114/jaxokexumeragikazozinu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458854/normal_5fce8649b29a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467285/normal_5fe42972d6466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5fef6a382af54.pdfIn PDF document text
    • https://zerasogamonan.weebly.com/uploads/1/3/0/7/130775055/vubalowapezedozirog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5fd1237452a61.pdfIn PDF document text
    • https://pigumetazemebet.weebly.com/uploads/1/3/0/7/130775485/raterusexe.pdfIn PDF document text
    • https://site-1197505.mozfiles.com/files/1197505/lenagofubelalumivexisot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378393/normal_5ffb6644d3b65.pdfIn PDF document text
    • https://site-1171554.mozfiles.com/files/1171554/i_m_a_barbie_girl_song_lyrics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528959/normal_5ffd603a3b4e2.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/bokelur/50138728652.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/bezprzewodowa_kamera_cofania_wifi_android.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/reporting_multiple_regression_spss_output.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/thallus_organisation_in_bryophytes.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_off0000d7b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B6 5292 bytes
SHA-256: 4f1a4b7ed589760f8fd7153c34a852bb18cfc567c5521e242f8377cd58394ea8
font_01_sfnt_off0000e986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE986 11560 bytes
SHA-256: 7a9b026a5e7651fb6eb776da8e944b22b6c0f4ed93898141baec10b59a3657f8

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