Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7133de71ff2c77…

MALICIOUS

PDF

78.2 KB Created: 2021-04-17 19:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ba4cd1868a085bdda7c014d061f70fb2 SHA-1: 90b4c79d9fe121df22930c44b7922984e43abe82 SHA-256: ad7133de71ff2c77417022d5aaada04891c93e5f59a4e63baa8735d29d53942a
124 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically targeting users searching for driver's license renewal information. The document's structure and link farm characteristics suggest it is designed to host a large number of deceptive links. While no scripts were explicitly extracted, the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of malicious intent, likely to lead users to phishing or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=how+much+does+it+cost+to+renew+ma+driver%2527s+license+in+alabama In PDF document text
    • https://cdn.sqhk.co/wujugojuse/bicKhqc/hepatic_flexure_syndrome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_603257bf6476a.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/gikilateweteropeforiko.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/sMJicHE/orange_game_character_in_pixels.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468837/normal_5fdcfe975ac56.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/zx4jfkv/23166698424.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_606745ddcc056.pdfIn PDF document text
    • https://cdn.sqhk.co/rasirise/ihiaij6/lepumogixiwawikagovabek.pdfIn PDF document text
    • http://demuxum.getenjoyment.net/liwadedewekebobibebin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409997/normal_600cee3727eb0.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ehjgg5M/download_sniper_captain_mod_apk_unlimited_all.pdfIn PDF document text
    • http://fibipowokogo.sportsontheweb.net/86923730816.pdfIn PDF document text
    • http://zukoretevir.medianewsonline.com/kapasabejani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2f3f26-2386-4520-a07e-5b7e70461325/76154388865.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_bf7451ddfa5b492f82e8d47e5baa7668.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6f6e5e-ed53-43a2-8e50-a589093aee4a/yamaha_rx-v867_firmware_update.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_8c765da67f474ef59f482a84a5ded7ad.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_a66cfb047bfd45408dc8c44a0711ff53.pdf?index=trueIn PDF document text
    • http://wugetad.myartsonline.com/19108427642.pdfIn PDF document text
    • https://a40b6db0-1679-4e03-879f-ac5827b9aa7d.filesusr.com/ugd/dba42a_b46a22807b754cb8b8aa2303ba018663.pdf?index=trueIn PDF document text
    • http://bexexakik.myartsonline.com/les_capitales_des_pays_d_afrique.pdfIn PDF document text
    • http://wozitoso.atwebpages.com/vuvuveju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41725a42-9b37-4cd2-b3aa-bc0bbb8dfe98/fce_reading_comprehension_practice_tests.pdfIn PDF document text
    • http://romepasuv.myartsonline.com/dififu.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_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 5468 bytes
SHA-256: ded8e65ec600c8bcf9548207810b9d504c3abcf99fcf3958b3f848acd10af35e
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 11288 bytes
SHA-256: 74b5aab7635b3cdea4fb69c6d3a0f76374da40b5ffe1e7f1198fac3f2c44fe45