Malicious PDF — malware analysis report

Static analysis result for SHA-256 b035d465194a6b02…

MALICIOUS

PDF

68.0 KB Created: 2021-03-26 02:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b35ff292824bb0eff9a365140087d967 SHA-1: 7f8a48356a961b181027d39f87e116fa28733e27 SHA-256: b035d465194a6b022148870fede0cda6e8bae8f19c5e787ca15de075f21086f4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed for SEO manipulation or to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=bluedio+h+turbine+manual
    • http://moxegelubopidi.sportsontheweb.net/somewhere_over_the_rainbow_ukulele_chords_glee.pdf
    • http://lowufadit.scienceontheweb.net/niziwiziru.pdf
    • http://nitanupemil.mygamesonline.org/84076104418.pdf
    • http://nelodagavezes.mygamesonline.org/valores_normales_de_biometria_hematica_en_neonatos.pdf
    • http://lulopoboxefon.scienceontheweb.net/28648816397.pdf
    • http://sivelural.mygamesonline.org/bonsai_cuidados.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/muvojugejoxip/14793232059.pdf
    • http://fataragoreb.myartsonline.com/rimabi.pdf
    • https://37b1cabf-41b6-4e27-befa-0fe7335ed416.filesusr.com/ugd/9d05b5_bd49ecb1f2474b7bac85c7111019fb0d.pdf?index=true
    • https://s3.amazonaws.com/lodazojamuva/sample_storyboard_template_for_video.pdf
    • https://s3.amazonaws.com/jarirotexab/68790151880.pdf
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_1f31a8dd8eb84f01a3f6b5325468df08.pdf?index=true
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_c202a5a971cb4be5bd97f6496d2bb8e4.pdf?index=true
    • http://loxupobupibim.atwebpages.com/aerobia_y_anaerobia.pdf
    • https://s3.amazonaws.com/gurafoga/fexolujesitosolomemeweri.pdf
    • https://s3.amazonaws.com/padadutiseni/meritorious_service_medal_template_air_force.pdf
    • https://s3.amazonaws.com/kifutizijebuj/zegisaxela.pdf
    • https://caa91486-5fcc-43b7-8b2b-5b817ae85bbe.filesusr.com/ugd/26bbcf_0cc283c49f9149209373d0e6f7e74261.pdf?index=true
    • https://s3.amazonaws.com/jixeremipet/how_to_argue_and_win_every_time.pdf
    • https://s3.amazonaws.com/zunaporam/viwuxegeziz.pdf
    • https://s3.amazonaws.com/jijari/wasuzaxa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cccc.bin
d6f4932be306b0c2d062e0af1a0f2fc6d142d6466c52d79b552755ce9e93f225		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCC 5076 bytes
font_01_sfnt_off0000ddda.bin
f352fd93eb5af826231acd86076f6e2d11e4e28182b8e07b8a2b3c42d8cfd55e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 10812 bytes

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