Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4925eabb9a0d6f…

MALICIOUS

PDF

76.7 KB Created: 2021-05-30 19:40:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 090cedde32bca2803553106787083d7e SHA-1: a8c16f3d782437b3d1c0d97d56bd2123704a82b2 SHA-256: 2a4925eabb9a0d6f5724d5140e61c2d633b9d838c2abcdd2a34219b555df1afe
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, with one primary malicious URL pointing to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/strik?utm_term=cuanto+es+en+metros+2500+pies+cuadrados PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4494432/normal_6014e37f6404d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5fe7f50aa9347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_6015b977d9328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473047/normal_6051e7274f4ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_600febd5c9809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_6066f55d274d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474720/normal_60392aa3b5988.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376602/normal_5ff507a7987b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_606920fee49a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_604ccc35a9de2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_600c059fafdd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fca414b26eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_605f3bbc61b8a.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/73ab206.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/884ed3d38a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444110/normal_600a4ed79f992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_60292dbe837eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/387eae8e-35bd-4a45-865e-2b60e0452749/honda_160_pressure_washer_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4ad897-ff4e-4f0f-ae9b-443127754154/buwobaregejej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60784600-d93e-4f0c-a97a-892f1411e8e8/why_do_pigments_absorb_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3055f8e-9b67-4864-bb96-9f1a9b2d5028/40801748862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3a0ccb-4731-4d18-91fe-8449569d35dc/ruzumodejupafokoxigunizet.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_off0000e7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 5488 bytes
SHA-256: 48825276e192a0d5b631e517d5d25838de2783a3364f2560b249c420817108f6
font_01_sfnt_off0000fa48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA48 12680 bytes
SHA-256: b29623f826ca5e80a73fd0b111a760eb82c63493c8acd72b6621c3eba7acded1

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