Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e22499c9a98fa2…

MALICIOUS

PDF

138.2 KB Created: 2021-04-08 07:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7a8752d813d21c84d6048b2e12af143c SHA-1: b6736ee363071b6fdee41a7c126a0dc2319d43ea SHA-256: b5e22499c9a98fa2f257394579dc83718e8e781b611d3708766347bc1df3f6a5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'druttle.ru', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=android+sdk+installed+with+unity PDF link annotation
    • http://tareworig.mywebcommunity.org/anodic_oxidation_of_aluminium_and_its_alloys.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368998/normal_600fd5d0643e8.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/cards_against_humanity_cards.pdfIn PDF document text
    • http://gakurijaje.iblogger.org/zopajedewoveradisu.pdfIn PDF document text
    • http://jubobusuzamap.22web.org/castlevania_aria_of_sorrow_walkthrough.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/fafijogigejefuv.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/94126696443.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/sample_budget_template.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495550/normal_5fee2ee678682.pdfIn PDF document text
    • http://segipaxi.iblogger.org/alien_resurrection_full_movie_dual_audio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478928/normal_5ff25a5315c87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_603ff9967a374.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_5fe647c4f3585.pdfIn PDF document text
    • http://deladinabixek.sportsontheweb.net/anlise_multivariada_de_dados_6_ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/begijufadi/69964501860.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/28631115617.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/how_to_send_certified_mail_from_home_usps.pdfIn PDF document text
    • http://titugol.atwebpages.com/35365301952.pdfIn PDF document text
    • http://kizuwopo.epizy.com/34805115058.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/african_american_theatre_history_timeline.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/gezaworesik.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/nanuvetidifexuxopupabi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 72960 bytes
SHA-256: 1928c641e77e4fe2422985283d115c8774cec9963cf7bed457ee14cdc36a8750
font_01_sfnt_off0001d599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D599 5044 bytes
SHA-256: ff6bbd69e6e9b6f89f21afc0e65e38b66ebf5938bf143bde3e2d7865e526e0b7
font_02_sfnt_off0001e6c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6C7 10636 bytes
SHA-256: b6f72057609cd38657b2c4aa6207b493e4d9ebf6650a4fd468f469b31dd50322
font_03_sfnt_off00020abc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20ABC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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