Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d87842fbb0f7f13…

MALICIOUS

PDF

76.0 KB Created: 2020-11-26 09:01:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1171f416460452e464809d58519e83e2 SHA-1: 38a875a16fc914703db9c2dd5156131e26173b07 SHA-256: 3d87842fbb0f7f13fe088e00c5dc28c34f58a06171f477db54e5df2f2bfdc3f4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The primary URL, 'https://traffset.ru/strik?utm_term=psafe+total+antivirus+gratis', indicates a phishing attempt disguised as a free antivirus download. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=psafe+total+antivirus+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414175/normal_5fa2429d12e0c.pdfIn PDF document text
    • https://juzatimeb.weebly.com/uploads/1/3/4/6/134605854/nagibupajuzadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466153/normal_5fb7752f0e139.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410447/normal_5fa839fee33b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_5f9f3f2c98e5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459624/normal_5fa2bda7847a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411944/normal_5f99e36fb61d1.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/665612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450257/normal_5fb8a0ec68618.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/sejenoki_tufitabekitabi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416653/normal_5fb8b4112eb13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_5fa209ec898d1.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/bovenotojitowe/the_last_day_on_earth_alpha_bunker_code.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/alldata_10.53_crack_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f90ccf0e-c2cc-4012-a5d8-805ed26e13d2/aa_meeting_list_ocean_city_md.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_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 4996 bytes
SHA-256: 225097bd547c4b926bb91bd051195c54b500f158ced33739948a0a2eac997410
font_01_sfnt_off000101bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101BD 9924 bytes
SHA-256: 49ef5df1ba9efc7cb8cf4d0916c74a24f3ec39ad5906571af5396fd5f694b459

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