Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a03e04382f64db5…

MALICIOUS

PDF

79.5 KB Created: 2021-04-06 09:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c2e7962d0b48683191c0426ad4cb534f SHA-1: 558ef83e7dc31736fa22d1e59b9c5c745e3649fc SHA-256: 2a03e04382f64db5e70c34603c80670809c350c41affb478ebd9c3821990c9fd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to downloadable files, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://seumenha.ru/award?keyword=agricultural+economics+and+agribusiness+8th+edition+pdf PDF link annotation
    • http://bobixuposu.22web.org/guia_gina_asma_2020.pdfIn PDF document text
    • http://new-leggins.site/formato_de_nomina_en_exceli4156.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/81865333975.pdfIn PDF document text
    • https://gigexozokup.weebly.com/uploads/1/3/2/6/132695408/givijeri.pdfIn PDF document text
    • http://xijonope.iblogger.org/affairscloud_banking_awareness_capsule_free_download.pdfIn PDF document text
    • http://igbusinessabouthelp.com/mere_christianity_study_guideitif0.pdfIn PDF document text
    • http://ipai.online/what_is_criteria_in_wrestlinguktxj.pdfIn PDF document text
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/pirufupipog_pebixaji_paxaxolilosowop_lazat.pdfIn PDF document text
    • http://evakuator-uga.ru/comparative_adjectives_game2w46e.pdfIn PDF document text
    • http://sipoxamux.22web.org/rodolireluziwiz.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/4196078.pdfIn PDF document text
    • http://nosinoski.shop/numeral_literal_e_ordinaltulps.pdfIn PDF document text
    • http://jabofedu.sportsontheweb.net/8099760836.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/nogoxipavezijus.pdfIn PDF document text
    • http://kugewezebuvigiw.mygamesonline.org/abundance_book_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/pioneer_avh-x1600dvd_wiring_diagram.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/polk_audio_magnifi_mini_app.pdfIn PDF document text
    • http://banobozibijur.epizy.com/33218017469.pdfIn PDF document text
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_177c3a205bcc45faae7649810983fc72.pdf?index=trueIn PDF document text
    • https://515a9975-19bb-4041-9922-7b1a45dc692c.filesusr.com/ugd/f34823_67838b7501294410a4ed2d23e355af39.pdf?index=trueIn PDF document text
    • https://76bf42c0-7447-45ed-8dd3-33f9786ae3ae.filesusr.com/ugd/ba2c19_8f573be9a7264e61881de684311b9593.pdf?index=trueIn PDF document text
    • http://vilatelisoto.onlinewebshop.net/baldor_aritmetica_gratis.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/63595467297.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_off0000df8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8D 5892 bytes
SHA-256: 14431f12b190b97474af03d72cf8069c4790944a94284fe72d15713f094b1bdb
font_01_sfnt_off0000f36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36F 10992 bytes
SHA-256: 57d1278f96feec0a9ab7b2fa84f47d56b52aed2b4ae07f7618752e901830e30d
font_02_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 16084 bytes
SHA-256: 462d13bd97d7d9b38b38dac4ddb889f891d4742debcdf3bbf084b15d68e01d41