Malicious PDF — malware analysis report

Static analysis result for SHA-256 c473e1c41fad31ac…

MALICIOUS

PDF

76.3 KB Created: 2021-03-10 15:44:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1d2af43156ebdef0880ba8a4b602acf9 SHA-1: 22fa6227ba6a1d6eb034be8a7615932236cf7872 SHA-256: c473e1c41fad31acd885f344358e55930d917a66d35b95577c77fa1676c162aa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, including one to 'leonvi.ru', suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attempt to redirect users to malicious content, likely as part of a phishing campaign.

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://leonvi.ru/strik?utm_term=how+to+connect+phone+to+projector+with+hdmi PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470835/normal_6008439620d6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388037/normal_5fc6b77440316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_60241ee696ebb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424682/normal_6024f114576c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fe9fd08186c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_8503021290a349b08596e438185b9eb5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/axis_direct_demat_account_closure_form.pdfIn PDF document text
    • https://4121a797-204a-431c-92a8-8e24072fb342.filesusr.com/ugd/b972d5_9e698f689dc34f99835422aefaccf5e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/pre_kick_off_meeting_template.pdfIn PDF document text
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_e3e896a75a514e678cb63bb90207e2c6.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_d39ee4cf81de414980b9c54bdd5b893d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mixanaz/flight_reservation_form_html_code.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/batezip.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_f57c22534b6e48d0b1bb71f997c66ba7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/waw_leviathan_guide.pdfIn PDF document text
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_3b316182717e44689e466fcf8c12da66.pdf?index=trueIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_e5a604b9f0b04587a615c0aaed4f567c.pdf?index=trueIn PDF document text
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_1bde1afa0f2243a49896bb2380e78d1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/kewefifumawazinemaxubunib.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/sociological_imagination_summary.pdfIn PDF document text
    • https://d0bf7e8b-5449-41c0-93e9-161603c0719f.filesusr.com/ugd/197ed4_77125eaa12c84cf1baab0a0d03811bdf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/47471184124.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_off0000eef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF1 5024 bytes
SHA-256: 361247a5e348629eb94c66c0317239a4e60d9bde5cc59975fd43af7c2d672080
font_01_sfnt_off0000ffeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFEB 10464 bytes
SHA-256: 515b0d5fab49f0590d989877806ae5d0f6e3ba25f7038576ed39da256ffa8834

Open this report in the interactive analyzer, or submit your own file for analysis.