Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61ee9fc3086110f…

MALICIOUS

PDF

69.0 KB Created: 2021-01-11 09:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2e771e68ef26b619cdaccf153373d0c2 SHA-1: 5613df13612524612f58d6b3778a8fc51d4f2650 SHA-256: b61ee9fc3086110f31766ae75baa72f61e144c05e5d10f4373be0c660f677749
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, pointing to various PDF files hosted on platforms like Weebly and Cloudfront. The primary URL, 'https://trafffe.ru/aws?utm_term=touch+vpn+premium+cracked+apk', suggests a lure related to cracked software. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

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
  • 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://trafffe.ru/aws?utm_term=touch+vpn+premium+cracked+apk PDF link annotation
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/2632610.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/2hfXaQb/1569516482.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/perajatosef-lonix-dowamitesegig.pdfIn PDF document text
    • https://cdn.sqhk.co/kogexuwalu/gdgj4hj/tujedegurokavugatadavod.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/gaganope.pdfIn PDF document text
    • https://menolalosixoj.weebly.com/uploads/1/3/4/7/134714047/3511330.pdfIn PDF document text
    • https://site-1171776.mozfiles.com/files/1171776/wurufodi.pdfIn PDF document text
    • https://cdn.sqhk.co/zubavagi/chjgXgf/kevawuvijelivelu.pdfIn PDF document text
    • https://site-1176298.mozfiles.com/files/1176298/74368022198.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/naxozelozude/14317087941.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/46761309700.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/minecraft_google_sites_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/illinois_unclaimed_property_reporting_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/little_league_baseball_pitch_count_data_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7E4 5176 bytes
SHA-256: bff6b207b5c56d7a6036ecb1ebbdd534bbe01fc0844dd4ff5360992c3b7721e7
font_01_sfnt_off0000d952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD952 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 10776 bytes
SHA-256: 75bba86e4fd534c5e7445d3510315dd4f73e2d2720fb0caa325918c76efa2ae8

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