Malicious PDF — malware analysis report

Static analysis result for SHA-256 02de10c69e7dbc86…

MALICIOUS

PDF

81.4 KB Created: 2021-04-03 18:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3ab72ecd25e3ffa00cf2a208f911573b SHA-1: 79036fcc5902a4306b92177e7d84577dd84052d6 SHA-256: 02de10c69e7dbc86316b066661202ad9fd18e12c755d6ed4bbb59c8d61430719
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'Batman movie joker wallpaper', suggesting a lure to disguise the malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file, pointing towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=batman+movie+joker+wallpaper In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475874/normal_6016b5d98bee0.pdfIn PDF document text
    • http://vejobazure.22web.org/video_converter_hd_apk.pdfIn PDF document text
    • http://gradstroy.su/kingdoms_of_amalur_alchemy_guideqkvbu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_60465818d4be4.pdfIn PDF document text
    • http://pedaxofanor.mywebcommunity.org/whirlpool_cabrio_washer_and_dryer_lowes.pdfIn PDF document text
    • http://mipexalazalekab.getenjoyment.net/alternate_interior_angles_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_60136e21c8002.pdfIn PDF document text
    • http://olymp-trade.top/how_much_is_darren_hardy_worthxppmf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493282/normal_5ffb585357b07.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/propiedades_fisicas_y_mecanicas_de_los_materiales_de_construccion.pdfIn PDF document text
    • http://onenature.space/mazavigijapasoxejuriloss4x5e.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
    • https://s3.amazonaws.com/muvarelo/tadexuta.pdfIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_b7ee2c1ed5db400ea725f65e76f9acaf.pdf?index=trueIn PDF document text
    • https://543e2b4d-9699-46d2-9656-875e860b8e63.filesusr.com/ugd/fb32d0_202f5eecb81e40e2b4f13f68db6e6513.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_24c29b21f30b46aa8c92afc4392e4447.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/42331816124.pdfIn PDF document text
    • http://mipobigagove.rf.gd/cancer_de_mama_no_brasil_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/vehicle_bill_of_sale_template_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/what_is_modelling_in_finance.pdfIn PDF document text
    • https://0d555108-1732-4721-8d72-76d747b2053a.filesusr.com/ugd/1b0481_0845394e97ce4723ae3897164709714b.pdf?index=trueIn PDF document text
    • http://vebusatoro.atwebpages.com/kafojatiravozometufaro.pdfIn PDF document text
    • https://ab7636f0-620c-4d49-ab1b-28e434a5f3c2.filesusr.com/ugd/cacfd7_b8e3284ffea14ec6a4b77eb9c3a59ebd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f38b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38B 4916 bytes
SHA-256: 70a936991e3765c29f1bf6d8757da3008aaaba7c7c8fec7d60d8521dec1d961c
font_01_sfnt_off00010436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10436 10628 bytes
SHA-256: 37933b91209aee447cb10be0cae4d12ae9cd5c948d4aa399751b72bef0be569c
font_02_sfnt_off000128a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e