Malicious PDF — malware analysis report

Static analysis result for SHA-256 798f39c1177c6e9d…

MALICIOUS

PDF

71.4 KB Created: 2021-06-08 15:38:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bf6bb0036b66271f37965dd3e931d96b SHA-1: 6878db2df2d1e59ff12336c6914b5e602800ddbc SHA-256: 798f39c1177c6e9dd2f6f0d8c9548db89291b948e4737da3bb3169350528fbc0
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body and extracted URLs suggest a lure for downloading software, specifically mentioning 'free download corel x7 full version with keygen'. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' further suggests that the document may be intended to trick users into providing passwords for encrypted archives, a common tactic for evading security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://wastran.ru/pbw?utm_term=free+download+corel+x7+full+version+with+keygen PDF link annotation
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/3856008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415304/normal_6027f52b41ca5.pdfIn PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/xutudategimalijusuxa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5fca78cfbf2ce.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/c4d3e44643c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458137/normal_5fc878a01f63f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wigonewakil.pbworks.com/w/file/fetch/144770598/27889295423.pdfIn PDF document text
    • http://bukafag.pbworks.com/f/disevaxu.pdfIn PDF document text
    • http://zuvuwiro.pbworks.com/w/file/fetch/144731397/download_pacific_warships_mod_apk_unlimited_money.pdfIn PDF document text
    • http://mifimoruzuwo.pbworks.com/w/file/fetch/144471018/download_cheat_gta_san_andreas_android_no_root.pdfIn PDF document text
    • http://zalonuzojeru.pbworks.com/f/king_kong_2017_full_movie_in_hindi_free_download_hd_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b29d0e03-20aa-4fc9-83c2-387a73c84705/does_sig_p238_have_a_safety.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442898b7-9ed2-450c-ae93-84c731a2983d/wusugununobipo.pdfIn PDF document text
    • http://pidexuxok.pbworks.com/w/file/fetch/144583716/bebukoxikobilip.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/why_am_i_not_getting_all_my_freeview_channels.pdfIn PDF document text
    • http://pifiloxema.pbworks.com/w/file/fetch/144712446/82576460692.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_off0000d9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DB 5704 bytes
SHA-256: 020bf714e7bf06342a283a9612689ca161672b3262bf8671c947b5f1b53c63b7
font_01_sfnt_off0000ed6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6B 10256 bytes
SHA-256: aab7bd19f2dd9e01545246ca54fc23ea3afd49bfbe8fe9deb7b78d186611e292

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