Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1042f46563b99b7…

MALICIOUS

PDF

104.8 KB Created: 2021-03-29 08:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5034cfb9b0a5768e37a9d42a8f5191bd SHA-1: 4a8e46131729a3023a7a65059852c9fb8a24b3fc SHA-256: f1042f46563b99b79ffb49e4f2f3ea1dc580a744d45c791aa063c19ddd362fcc
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 0.9989

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://xezojetit.ru/wix?keyword=mini+maquina+de+coser+manual+portatil PDF link annotation
    • http://vosajizegek.mypressonline.com/kesizutobuxekeridobuzev.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/resumo_sobre_o_ciclo_de_krebs.pdfIn PDF document text
    • http://zafikapasipugog.medianewsonline.com/rakawijobabopalozizatuv.pdfIn PDF document text
    • http://jabudapitu.scienceontheweb.net/advantages_and_disadvantages_of_group_technology.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_605d5f32d5e4c.pdfIn PDF document text
    • http://islemleriniz.org/best_movie_quotes_about_lost_loveem4rm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367308/normal_60518c80b4eb8.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/xelimewat/asme_bpe_standards.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/adobe_reader_for_android_4._0.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/jikiwizadakunovuwo.pdfIn PDF document text
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_fdc71fb814784080855278979aa9b8a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/67491322410.pdfIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_330aab5bc23e4618923d95eaafa8efbf.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001185f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1185F 6744 bytes
SHA-256: 0eac1552a6a0cc8d6d43e14f5c157d052ff2bf21460314f67a2c213e0a454e63
font_01_sfnt_off00012915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12915 3216 bytes
SHA-256: 3bb05a7071ca129515cb9be1a05d16f3bbce5202ecd4a7551cc2146042346696
font_02_sfnt_off000134ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AE 5348 bytes
SHA-256: 73b56a53504d07fe0f0e74b1e6e2a9de15ce8c3c94d52cf167573c15fcd9e65d
font_03_sfnt_off000146c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C0 2536 bytes
SHA-256: 5a657bfc532ea8d87845e3c5478c153e910c8c67a087c14df3f33a419430b9c4
font_04_sfnt_off000151b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151B4 12860 bytes
SHA-256: eb2f40acf01b4490da3beed4b1ee750ed7ca079e2d6dfcc062688eadd7a5d1f8
font_05_sfnt_off00017b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B51 16764 bytes
SHA-256: 7fe5bf7defc6b0b05445e368cde746f8464eca1d1c2cae1e5d4bc8fe3f5a9a15

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