Malicious PDF — malware analysis report

Static analysis result for SHA-256 4317ece6d9f98037…

MALICIOUS

PDF

75.8 KB Created: 2021-04-02 00:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b15e14ec7fe875dcef2114561320f909 SHA-1: d47a492b3ed7dd0165a9dbb2b34119aa9060d200 SHA-256: 4317ece6d9f98037facd6a988164fe5643be71af0606833b37e84d0813c20703
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://midufefew.ru/wix?keyword=blue+pelican+answers PDF link annotation
    • http://wimudevereru.sportsontheweb.net/30733792668.pdfIn PDF document text
    • http://zexawabezazojot.sportsontheweb.net/83789998559.pdfIn PDF document text
    • http://parkji5x.xyz/the_story_of_us_revolution_worksheet_answers4w3e2.pdfIn PDF document text
    • http://afracheat6.xyz/7760652610jsoqy.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/arachne_the_spinner.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/the_other_side_of_the_door_2016_full_movie_in_hindi_download.pdfIn PDF document text
    • http://mailedflkf.site/a_dangerous_job_94_answerspgr6i.pdfIn PDF document text
    • http://opt15.ru/how_to_conclude_a_dissertation_literature_reviewiiw20.pdfIn PDF document text
    • http://ruluzuzadol.mypressonline.com/69826543469.pdfIn PDF document text
    • http://mopexaxurip.getenjoyment.net/ukulele_chord_melody_songbook.pdfIn PDF document text
    • http://apparentlyopt.com/346568719809leyf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://romapubimowa.onlinewebshop.net/vba_excel_functions_list.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_37e9749ec4834f00a9b5f0f53686f515.pdf?index=trueIn PDF document text
    • https://d451e762-8e00-4155-9971-9512d28d2528.filesusr.com/ugd/b52961_bbcccf3f41f641c78cf3897a6d24bf43.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_0366d633709b4b08a599c562a1c1c056.pdf?index=trueIn PDF document text
    • https://a529afa0-707c-494d-9cee-e9df2360aa12.filesusr.com/ugd/a6e48a_c60117d3acb94738b769864816a62658.pdf?index=trueIn PDF document text
    • https://a7da3e60-63c8-46c1-a846-eab7df628ed2.filesusr.com/ugd/bba345_1ca36d68b8634099a1b065e4559bc2a2.pdf?index=trueIn PDF document text
    • http://lifobem.myartsonline.com/jemedorilupax.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
    • 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_off0000d1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CE 5068 bytes
SHA-256: 96a545508b1e5c2a244a361cba3d9877c440173d7f49b735992408dd89ea3dc8
font_01_sfnt_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 12324 bytes
SHA-256: 0d179cc53fc8dd954d578bb5e6b243453fe1c33040b3937fe7ff6ab4b0ad67cb
font_02_sfnt_off00010d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D16 16148 bytes
SHA-256: f2fe1b341ce625982f6229602509497cf1a9423964c663a7c58f6fce8010e377