Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ecc951dc7fd3e9e…

MALICIOUS

PDF

110.3 KB Created: 2021-03-23 01:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63d95538c352ce49dbefad98b1fc67bb SHA-1: 171730edb1b39550bf51dea33e8de61e6ba12813 SHA-256: 5ecc951dc7fd3e9ed7afb929f27dd4cdce0cb4f9b00a14228c6348e06edfdbd5
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=software+quality+assurance+process+pdf PDF link annotation
    • http://trickyturkey.com/ancient_magus_bride_episode_21lv0a2.pdfIn PDF document text
    • https://cdn.sqhk.co/dokadajij/uT8gfie/hashtag_ai_smart_hashtag_generator_for_instagram.pdfIn PDF document text
    • https://vafevovelawa.weebly.com/uploads/1/3/1/4/131407112/sozutop.pdfIn PDF document text
    • https://cdn.sqhk.co/jomububorava/dgdx8pV/gta_5_zombie_apocalypse_mod_multiplayer_download.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/muwif.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/e2d7160e.pdfIn PDF document text
    • http://apple-fruit.space/dlybm.pdfIn PDF document text
    • https://zakikubefetopu.weebly.com/uploads/1/3/2/6/132696201/pugifi.pdfIn PDF document text
    • http://tersq.fun/17217559470gines.pdfIn PDF document text
    • https://cdn.sqhk.co/rizuwevize/e1G0KmW/rurogasoxetaletixoki.pdfIn PDF document text
    • http://volosaty100.xyz/ante_nicene_fathers_complete_setwn8nx.pdfIn PDF document text
    • http://wisitens.online/merisinuwijinutizaj2lotj.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/keirsey_temperament_sorter_results.pdfIn PDF document text
    • http://domsale.xyz/android_auto_app_google_mapsjiv13.pdfIn PDF document text
    • https://cdn.sqhk.co/vewukiziwemi/hbtlmJZ/calendar_october_2020.pdfIn PDF document text
    • http://zatoboyvibor.fun/38475093665rpiss.pdfIn PDF document text
    • http://goromeo.club/how_to_pair_hmdx_jamzyltg.pdfIn PDF document text
    • https://pipamoximiketo.weebly.com/uploads/1/3/0/9/130969724/d7fe0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://revudipepofaten.myartsonline.com/dissertation_sur_le_civisme.pdfIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_ab997ca44135448287b8af3b7778259f.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_1c833a2a61df46d28f9284a2e53b7458.pdf?index=trueIn PDF document text
    • https://2df275fc-a8dd-466e-be95-33fe0afe7bed.filesusr.com/ugd/9b6d1e_27ec2b7cae7d429097be12db3e33b234.pdf?index=trueIn PDF document text
    • https://e94fd2ea-e363-40b7-879f-601f98d10a93.filesusr.com/ugd/89b1bc_dabc11a845dc45079a57a1590ef30d43.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15656 3352 bytes
SHA-256: 91c30e2d1ada78d216450f988df81a9b8af68f06a1eabed5d87816fe5ae9965c
font_01_sfnt_off00016255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16255 5456 bytes
SHA-256: 1796aadcf70a946cd702d783800140092549beb132293c4f02f77b9c219a2671
font_02_sfnt_off00017501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17501 11904 bytes
SHA-256: e07d2383a6367a90252980ba5efc699cad5a8ba6503317b291f89f77f61819a2
font_03_sfnt_off00019d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D09 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2