Malicious PDF — malware analysis report

Static analysis result for SHA-256 95ea800ccc57df1f…

MALICIOUS

PDF

75.2 KB Created: 2021-03-16 18:34:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1d00dc295faaded35aba951315492512 SHA-1: e2e19504a09e79eb54bcecf3b21d3934fdbe5255 SHA-256: 95ea800ccc57df1f4bec4667a55982750c5cad71adae9f249d831fc2eb4b728e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'resalured.ru' and a query parameter suggesting a lure related to 'adlerian therapy theory pdf'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/123?utm_term=adlerian+therapy+theory+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408462/normal_6050105000857.pdfIn PDF document text
    • https://gepekipaw.weebly.com/uploads/1/3/5/3/135304147/gagajotuzasuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5fc813a4c2559.pdfIn PDF document text
    • http://gedenidaxinexo.22web.org/kexugad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378404/normal_5ffb58a538783.pdfIn PDF document text
    • http://masimepipet.22web.org/60684430578.pdfIn PDF document text
    • https://najatiruz.weebly.com/uploads/1/3/0/7/130738831/2313afa704d7f4.pdfIn PDF document text
    • http://ladariduzaw.22web.org/what_does_zappos_do.pdfIn PDF document text
    • http://bibiladiwoz.22web.org/zuwewopaxilusored.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/lesibakiwix_bamomol_laxuwojoboza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374359/normal_5fc715379cdb3.pdfIn PDF document text
    • https://jukonejidar.weebly.com/uploads/1/3/4/8/134876273/vujipe-sutimijejuzu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530070/normal_60288f9488632.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zevuketeno.rf.gd/oxigenoterapia_puc.pdfIn PDF document text
    • http://peromur.epizy.com/71893068295.pdfIn PDF document text
    • http://mowigibimubepi.rf.gd/asus_b85m-e_br_bios.pdfIn PDF document text
    • http://doronelibi.rf.gd/philips_air_fryer_recipes.pdfIn PDF document text
    • http://fepapasofefo.epizy.com/dengeki_bunko_crossing_void_english.pdfIn PDF document text
    • http://kubazemaxem.epizy.com/excel_sum_multiple_cells_in_multiple_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/annual_emergency_light_test_sheet.pdfIn PDF document text
    • http://mogajepan.epizy.com/2385291150.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/64165487922.pdfIn PDF document text
    • http://wewodis.rf.gd/sample_commercial_proposal_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/cheat_engine_for_pc_games_free.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_off0000e958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE958 5044 bytes
SHA-256: 2f615c808ea714264c40dddc9ae48d1f29612d71cab00a9f60f0d5b5db34f7bb
font_01_sfnt_off0000fa83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA83 10584 bytes
SHA-256: 44859f4c2b1941ed52f3bc186ee429f7c1a669c3f68d9c8c68c4e82006896c04

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