Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eaa7c2e65b051ce…

MALICIOUS

PDF

73.7 KB Created: 2021-03-25 09:36:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2ef24eb18e873cfb67493d0b378c9941 SHA-1: d784897257f6358a8d2fb9669bdf0631e6fb5e7f SHA-256: 3eaa7c2e65b051cebb4ae12c866a26d4567b628bff1e828d0c623b8dc3c0f7e9
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites for credential harvesting or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URI heuristics point towards a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://mezovuduw.ru/award?keyword=restaurant+cashier+job+description+pdf PDF link annotation
    • https://xoverepidagagit.weebly.com/uploads/1/3/4/4/134469055/kudekosegit_kizonu_dewoker.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/a4e3d8e5a3ff446.pdfIn PDF document text
    • https://pamezupiv.weebly.com/uploads/1/3/0/7/130775156/1476e1a.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/vebaponulirexogirelebuz.pdfIn PDF document text
    • http://icub.tech/brown_bear_brown_bear_free_printable_mini_bookybwfa.pdfIn PDF document text
    • http://qqkaxes.xyz/47535196720w1kd8.pdfIn PDF document text
    • http://subuxiwubemew.getenjoyment.net/40207754031.pdfIn PDF document text
    • https://sinidagiritab.weebly.com/uploads/1/3/5/3/135386058/gipatodexavupeko.pdfIn PDF document text
    • https://tuduzijusesuzi.weebly.com/uploads/1/3/1/4/131406801/6076235.pdfIn PDF document text
    • https://samazixudoreput.weebly.com/uploads/1/3/2/6/132681586/lomomomabosal.pdfIn PDF document text
    • http://trikotoria.ru/eragon_tamil_dubbed_movie_download_in_isaiminijeuob.pdfIn PDF document text
    • http://yozi.store/62263499819wl4gp.pdfIn PDF document text
    • https://labelamujevodit.weebly.com/uploads/1/3/1/6/131606697/lezilutakafor-lafutovugalezu-musijirumade-guxupowovopolav.pdfIn PDF document text
    • http://sdek-24.cc/10633368375vfn9y.pdfIn PDF document text
    • http://hookup153.fun/r_programming_full_tutorial_free_downloadsxtpd.pdfIn PDF document text
    • http://trastenmyqort.online/22358142235a39m6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://legizoro.epizy.com/bukhari_sharif_in_urdu_free_download.pdfIn PDF document text
    • http://nubejapowij.epizy.com/iron_man_1_imdb_parents_guide.pdfIn PDF document text
    • http://wegudewabeko.rf.gd/introduction_to_abnormal_child_and_adolescent_psychology_weis.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_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 5436 bytes
SHA-256: 0a81ecce3e3a2fac3c70c00dda733f58463c7c1185050972f44a53724d7c9986
font_01_sfnt_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 10848 bytes
SHA-256: 996b0cf7e03659a41c3532cd4bb726b41fc50a25955418e61c5bdcad4963c063

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