Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5f5c2e6116c518…

MALICIOUS

PDF

91.8 KB Created: 2021-05-16 09:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7b88d7e5bccbd14c77d5e0cafe2168c5 SHA-1: c791020ef9a6f501a1570d142fe16e9e17642855 SHA-256: ee5f5c2e6116c518c7863f1c7009ab866a6812f742432db6e26b161642afde48
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 0.9992

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://botokaw.ru/strik?utm_term=himnos+dela+iglesia+de+jesucristo+delos+santos+delos+ultimos+dias PDF link annotation
    • http://vipmanmarket.space/campoformido_udine_corrieralmter.pdfIn PDF document text
    • https://rutedidatares.weebly.com/uploads/1/3/4/4/134490949/eb58480074db3.pdfIn PDF document text
    • https://kutolimog.weebly.com/uploads/1/3/4/4/134435461/pemoz-goxigonogifosaw.pdfIn PDF document text
    • http://nicepics.xyz/fabijutubuwealq.pdfIn PDF document text
    • http://characduwe.space/nidajobakalevuviximovi7e2rd.pdfIn PDF document text
    • https://fosevagepuvuro.weebly.com/uploads/1/3/1/8/131858592/1052591.pdfIn PDF document text
    • http://begemotiks.space/zikejuxuvenafitwwm1.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/galewememewubeta.pdfIn PDF document text
    • https://kotuvowomikek.weebly.com/uploads/1/3/4/3/134370123/3f7701905ed9.pdfIn PDF document text
    • https://ramujodavuratot.weebly.com/uploads/1/3/4/6/134667495/mogajizusuj.pdfIn PDF document text
    • http://wugipesirexoxof.mygamesonline.org/english_grammar_correction_of_sentences.pdfIn PDF document text
    • http://sodahub.pro/angels_and_demons_book_vs_moviernoo2.pdfIn PDF document text
    • https://dupagerenukuxat.weebly.com/uploads/1/3/4/7/134751723/6806c.pdfIn PDF document text
    • https://sisareses.weebly.com/uploads/1/3/1/4/131454440/rikik.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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
    • https://uploads.strikinglycdn.com/files/afd7a4a1-a0a1-4459-b83a-a5e5ffbca629/peter_drucker_management_theory_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/650e8cce-d599-46a1-8c56-6deeb03190f6/how_to_make_a_greek_toga_out_of_a_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/027cd30d-ed8e-46c5-a352-557824790299/witcher_3_official_game_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d0b6413-8b12-434a-867d-04680e5ffd7a/are_zebco_reels_good.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd5d341-2ff5-41af-89c2-2a1683d85f33/5685520958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413b126d-635d-4226-aefc-27a8b330f6f0/tantric_massage_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d690d0dc-4108-4c95-8100-5b9c326fd08b/xufavajujunisilalogun.pdfIn PDF document text
    • http://woxesizefibugel.atwebpages.com/28637721260.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F06 2192 bytes
SHA-256: 16ff826bb9ff509738d6d9089a31f020bdb01a885c901a0d33d101898c7f6018
font_01_sfnt_off00011913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11913 5180 bytes
SHA-256: 714fe19ef9d78af0bb61c1d82223e85213df9b90ba633a2acd7083a4b0a3748b
font_02_sfnt_off00012a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8F 11660 bytes
SHA-256: cd766cec4cc397225aee2bd85c303b94ab93bcf29d1610db3cb9c1dfee7c721e
font_03_sfnt_off00015089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15089 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e