Malicious PDF — malware analysis report

Static analysis result for SHA-256 565feed415b1fabf…

MALICIOUS

PDF

72.8 KB Created: 2021-03-21 05:31:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7cef605fff5baa76dd0304456674c2ba SHA-1: 1eb6cb2f5e30204e5dc70c60bb9efb7262daa65d SHA-256: 565feed415b1fabfd3980a55e0a0173f410ea8fa8c89c3111f7a26a69a622923
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF link farm'. The primary URL, https://soxebez.ru/123, appears to be part of this network. While no scripts were directly extracted, the heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to redirect users to numerous other PDF files, likely for malicious purposes such as distributing malware or phishing content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://soxebez.ru/123?utm_term=hpcsa+general+ethical+guidelines PDF link annotation
    • http://wovoradomumakil.medianewsonline.com/kudabubutodalofol.pdfIn PDF document text
    • http://idclick.cash/tokyo_ghoul_re_season_2_hulucshlz.pdfIn PDF document text
    • https://tezubowaxax.weebly.com/uploads/1/3/4/6/134640868/f6c2826655283.pdfIn PDF document text
    • http://linavaluviriv.getenjoyment.net/resort_architecture_design.pdfIn PDF document text
    • http://josumewemuzob.getenjoyment.net/how_do_i_lookup_my_driving_record_online.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/the_bitcoin_standard_book_review.pdfIn PDF document text
    • https://kutenamig.weebly.com/uploads/1/3/0/7/130740069/vovof.pdfIn PDF document text
    • https://rutedidatares.weebly.com/uploads/1/3/4/4/134490949/jatamisawimizu-muzani-dalojore.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/analog_and_digital_sound.pdfIn PDF document text
    • http://nakanilo.club/manette_wii_ne_s_allume_plusphqu1.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/navy_seal_pistol_qualification_standardssl1h8.pdfIn PDF document text
    • https://danevetiwa.weebly.com/uploads/1/3/4/6/134600357/2c6d3552f433f8.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/rutufokedizon/17011646229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/869d0e09-f1e9-482d-8d2b-2085663a7d16/4382258764.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/benefits_of_formative_assessment_in_education.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/28898570228.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/how_much_does_hbs_mba_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/nurgle_blood_bowl_team_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c5e746-7da2-4fca-9a90-ec8ed94ef691/simple_price_comparison_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed2e0d3a-2719-49eb-a727-c1de71654dce/pupufufukevanofotufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfd97a9-4209-42f6-b1f4-f03ab03f6367/ps_vita_slim_cheap_price.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD05 5296 bytes
SHA-256: 770a639d8c2fd2796f7dc3110b49bc093f6144480bdb58cbbd1b144fd22b5a9c
font_01_sfnt_off0000eef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF8 11460 bytes
SHA-256: 39e55add31d308b8d885d6ea3c157e52411bee1fbdf54685e0c6545ae6b46d90

Open this report in the interactive analyzer, or submit your own file for analysis.