Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f24b5f8c82ca37…

MALICIOUS

PDF

76.3 KB Created: 2021-03-11 07:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 02cc6d3e327c70889002e3b3af90a99b SHA-1: bca9fe7462aba5279c0d5c59bde3b3c8a3352c29 SHA-256: 45f24b5f8c82ca373484a20abfd01fd5329d7765a23124da7bacbf2c06fb2c1b
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to educational templates, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=college+lesson+plan+template+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365601/normal_5fe25f19af0a4.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/88848736091.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/how_long_after_gastric_bypass_do_you_lose_weight.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/f92kghg/readymade_projects_for_mba_finance.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/60661996986.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/chjQggz/planet_of_the_apes_2001_cast_caesar.pdfIn PDF document text
    • http://pidawudimo.scienceontheweb.net/love_story_chords_no_capo.pdfIn PDF document text
    • http://raxewapikeb.mygamesonline.org/pdf_to_autocad_2020_dwg_converter_online.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/sodekezoxisawefuve.pdfIn PDF document text
    • https://cdn.sqhk.co/wigalefu/jhdwheS/87075908914.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_603b2fedd3beb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_756b737728cd40ac9df840c091d9604b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3556d6a-a229-49e3-b5d1-319d6fff75d3/pavowalujeginapurego.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b200f9dc-cf15-4af2-a89b-7fef4df1cef5/georgia_drivers_license_renewal_if_expired.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6185c8f-3933-4b05-bd55-fbf8350c7d53/los_generales_de_dios_3.pdfIn PDF document text
    • https://8a7e94d2-1b07-4399-8a7b-cfebf1eb419e.filesusr.com/ugd/e78b77_b10bb8e5b075454dbcf1bf72204fdaa0.pdf?index=trueIn PDF document text
    • http://godusisoti.onlinewebshop.net/borotarobaponaxujob.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/how_to_download_disney_plus_app_on_apple_tv_3rd_generation.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_052f3caef9f14622bcb9ece0e23531a7.pdf?index=trueIn PDF document text
    • http://nedizilunok.myartsonline.com/what_is_one_example_of_a_nonliving_thing_in_an_ecosystem.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_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 5168 bytes
SHA-256: 3ed0c898946e80d3ee27b4cbdaa1f9d23fc60e7ae72285f0477bce053a4bcf9e
font_01_sfnt_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 10972 bytes
SHA-256: 1026c8d4b0e8bb1b05e21812025eaf5c2d64864917fd1f4bb48ce60203ee71a7

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