Malicious PDF — malware analysis report

Static analysis result for SHA-256 da46d8db3b4631ff…

MALICIOUS

PDF

76.9 KB Created: 2021-06-04 10:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 25aef944a90e213e90d2356b5798f57d SHA-1: eb9748d9a167c3a74841c136714f76377be8b01f SHA-256: da46d8db3b4631ff854bc7cd17224a89aeeeb20c67f87b189065976d31614c64
166 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway scanning. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://philabc.ru/pbw?utm_term=ken+tech+clock+directions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476445/normal_600f82d454d23.pdfIn PDF document text
    • https://sumeropesoxiv.weebly.com/uploads/1/3/5/3/135316328/godozoxon.pdfIn PDF document text
    • https://mezulawa.weebly.com/uploads/1/3/4/5/134597648/fujib.pdfIn PDF document text
    • https://figeneluniw.weebly.com/uploads/1/3/4/8/134857588/tavepof.pdfIn PDF document text
    • https://kesoxebexug.weebly.com/uploads/1/3/2/6/132681937/totigilubizutuz_fotovire_wotenosubej_divedirizezaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415742/normal_5fced3f621cfc.pdfIn PDF document text
    • https://gopiwalugase.weebly.com/uploads/1/3/0/7/130738825/7747cceb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://panuduxeruv.pbworks.com/f/54665466107.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/f/badujibe.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/f/rejawakibizegipokibi.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/f/92908995647.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/144455022/81444328284.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/fsx_steam_edition_multiplayer_servers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8f2c734-b9b0-4d9c-83d0-1ae2695fb587/chopin_valse_op_69_no_2_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609a6e2b-c41e-431a-a6d0-b4db9876fbcf/diferencia_entre_presente_perfecto_simple_y_presente_perfecto_continuo_en_ingles.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/w/file/fetch/144486756/tech_n9ne_albums_free_download.pdfIn PDF document text
    • http://sipibujewadu.pbworks.com/w/file/fetch/144524958/santa_claus_is_comin_to_town_piano_sheet_music_with_letters.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_off0000ef01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF01 4848 bytes
SHA-256: 2b94a3c65a4098ccdce38f61d3ae90427cf3558fa872047f3ad853f6248fa51c
font_01_sfnt_off0000ff79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF79 11248 bytes
SHA-256: fd704d95faa1bfb32d19ba6ca33e2c99c2db675f092cd9584e5cd510fa037034

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