Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec5cf7f1e2aac36…

MALICIOUS

PDF

71.5 KB Created: 2021-03-22 02:29:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7d8018012071d1137aa1183ea2d5b057 SHA-1: ef7e450efae9b7290c110f90eed55f48fd3c7964 SHA-256: 0ec5cf7f1e2aac364ab5ba7a276ec4cc1c4c38ce668d44540b427ad006080d71
186 Risk Score

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 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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://bologen.ru/strik?utm_term=burger+king+vegan+impossible+whopper+calories PDF link annotation
    • http://kogutojoveso.mywebcommunity.org/bser_10th_maths_book.pdfIn PDF document text
    • http://nunopasatipimav.medianewsonline.com/what_is_the_definition_of_revolution_in_social_studies.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408197/normal_5fcb01b5eb7ba.pdfIn PDF document text
    • https://cdn.sqhk.co/musarawaw/g1wWNge/83763670417.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/gL4jchf/gubobinugupobapuvapofovem.pdfIn PDF document text
    • http://reduslim-ordina.site/53194333537uodhq.pdfIn PDF document text
    • http://sodahq.club/what_are_the_different_types_of_contrastv8mkh.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/gh70Ph2/world_cup_2022_qatar_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/iahfrgi/how_to_create_a_youtube_gaming_intro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378853/normal_5fddbd083fb78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ee6bc897-aa08-459d-b6e6-b1b1d69fcba1.filesusr.com/ugd/7ba596_29131b87e70b43138447b41beff406e3.pdf?index=trueIn PDF document text
    • https://d6b7b3c7-8429-4d82-9d75-5d5d09e763cc.filesusr.com/ugd/a8c229_fd22f9632b0c4ad2a854e5f62adf83a2.pdf?index=trueIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_aebb2dba275f4e99a3fa776ded65e0f8.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_d14af4ed2dbe4a70bd1a282f7bfbef97.pdf?index=trueIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_fb4263c8759a418fadc707170c769c99.pdf?index=trueIn PDF document text
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_48588cd368b54fd9ba8fcf1156c09b48.pdf?index=trueIn PDF document text
    • http://rexefobixavater.myartsonline.com/how_to_replace_ink_cartridge_canon_pixma_mg2220.pdfIn PDF document text
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_57b19fd5df69445b9c61ee46686c5674.pdf?index=trueIn PDF document text
    • https://b67fa923-03b4-4d21-b555-95ff628d7525.filesusr.com/ugd/1d4b90_3588664cdf3d4ea7b45153212ff8dd79.pdf?index=trueIn PDF document text
    • http://milebulijulami.onlinewebshop.net/20256532914.pdfIn PDF document text
    • https://460eb545-5389-4aa9-9e78-d1074a8bca0c.filesusr.com/ugd/21a131_56d63fc7d41c445296516968f2dfa7b0.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 5752 bytes
SHA-256: e40e21753b7982edf904ee00faf652570d5622986b358d1e52c78ff2f9efa919
font_01_sfnt_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 10236 bytes
SHA-256: 0bf7802f8dd73aa2806cb5b2de9551aafa94c4933ced992b2c269e80d241f9b5