Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7fcaa04eef5ea11…

MALICIOUS

PDF

81.8 KB Created: 2021-03-17 07:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c0620529b7c5526078fdfd00acc8ee4d SHA-1: d859661e4bd09df2d37453f3beb05b0acf4e8d39 SHA-256: e7fcaa04eef5ea117f39d9bf5f3f5569a42896e618797143e4b5c34e45ff1215
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=libro+el+kybalion+tres+iniciados+pdf PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_ed2b93fb9ff24881822f97cc9eeedb6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/panokojol/downeaster_alexa_piano_sheet_music.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_cf4ecdd6bc7a42ae83b40bc205ebe4fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wavunot/android_emulator_has_no_internet.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/kufowobegapedamuxeti.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/sunepujafama.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/adverbial_definition_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/inheritance_cycle_book_6.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/81853194358.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/what_is_the_definition_of_religion_answers.com.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/whatsapp_messenger_for_windows_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32340232-160b-4741-b5bb-bd7c365a76a8/tavimazesezovurev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec61dc5-c529-4f64-a5a6-2184b95d24d7/75387818841.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e7af6f-0309-4ca3-bf39-6f6ca41ced1a/what_is_italian_renaissance_art.pdfIn PDF document text
    • http://malosebetu.epizy.com/soguzazavenebuxas.pdfIn PDF document text
    • http://fipivolakiwupod.rf.gd/52761477275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0252b71d-5ccc-481e-95fb-d0609c0323da/how_to_think_like_leonardo_da_vinci_100_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/fopunivagosus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d7ec20-5cab-48cc-ba64-d80e5fdcb797/which_came_first_christianity_or_judaism.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_ae0626b91f6046089d8d3611823adfcd.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE882 5396 bytes
SHA-256: 9e269d1affb384f90e6738d9148aab40b9eb4f6cf77e342f5c1837210ac5bc1e
font_01_sfnt_off0000faf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF3 12232 bytes
SHA-256: e604da187cf7f62b46d2d0e5c68f7be82c95b34131cd798c104348ac9e8e55be
font_02_sfnt_off000122ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CA 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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