Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0eab709b12d0b61…

MALICIOUS

PDF

120.3 KB Created: 2021-04-01 23:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 4a13acee2489c8eb8c7cf5a56ab2a3d7 SHA-1: 4640e7d03792bedfc092fd5e698844b458ac4011 SHA-256: c0eab709b12d0b6178af134a4cc71a5453dddb3db11154082c0e6cc42b5e949e
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically indicates this pattern. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/123?utm_term=please+be+informed+accordingly+%25E0%25B9%2581%25E0%25B8%259B%25E0%25B8%25A5+%25E0%25B8%25A7%25E0%25B9%2588%25E0%25B8%25B2 PDF link annotation
    • https://jetisinodab.weebly.com/uploads/1/3/5/3/135335938/livedapobumazebiten.pdfIn PDF document text
    • http://pochta-24.cc/61995094871yikai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_601d24a0b9051.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/vuwoto_xosararera_tavawibifo_mirevesax.pdfIn PDF document text
    • http://littlenat.space/archicad_22_30067yv33.pdfIn PDF document text
    • https://tawigijonepoter.weebly.com/uploads/1/3/4/0/134012415/ff740189446.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/d2ebfed4fb0.pdfIn PDF document text
    • http://zdorovienashevse.xyz/how_to_write_an_essay_outline_samplez0o9n.pdfIn PDF document text
    • http://movawugutel.22web.org/72681403793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469828/normal_5fc716106e38b.pdfIn PDF document text
    • http://selizixid.iblogger.org/46771719505.pdfIn PDF document text
    • http://cosmeteca.com/58920556085zar6z.pdfIn PDF document text
    • https://dasovarelebeji.weebly.com/uploads/1/3/4/7/134712834/6938122.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcad1cc490af.pdfIn PDF document text
    • http://tdsevsvet.ru/viwekodafixajudif8zd31.pdfIn PDF document text
    • http://1xbets-regs.site/evolutionary_psychology_apa_definitionfpmqf.pdfIn PDF document text
    • http://pressit.space/vw_beetle_transmission_code_locationoi4w0.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/85313902037.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/evermotion_archinteriors_vol_30_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/36872635679.pdfIn PDF document text
    • http://pikizefomuwajo.rf.gd/pdf_to_word_converter_app_download_for_android.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00017313.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17313 19436 bytes
SHA-256: 04537f3ecdfc9c1ac853f572d1eb853e61e842e97505face3532c4e342821afa
font_00_sfnt_off00014f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F1F 5584 bytes
SHA-256: 85aab872847ce374fa74b2b27a93ae3c8cfc4a7caee37dcd49ce98d430d405b4
font_01_sfnt_off00016204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16204 6608 bytes
SHA-256: 6522211b265cf5f1afa3fa0910281dfc63663517b1be8b8756ad10123bd22060
font_03_sfnt_off0001a6de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6DE 12232 bytes
SHA-256: b94cc9ab0bd1d3bb0bcf8e9e422153ee12c3fdfd1dd935714ca88fdcdacaf84f