Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d5f7e5e6034a09…

MALICIOUS

PDF

93.4 KB Created: 2021-03-29 00:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d9e28c70ff44e914de788111928d4b06 SHA-1: d583a17780cdbd8c0b97f824855e012431f9db2b SHA-256: 36d5f7e5e6034a094018353e1213aaf3af77bf36ccad0ad3d5f9777b1e85947f
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fokemale.ru/123?utm_term=aarakshan+full+hd+movie++720p PDF link annotation
    • https://supesitibozuxo.weebly.com/uploads/1/3/1/4/131454850/6321792.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/amidah_english.pdfIn PDF document text
    • https://jarivilil.weebly.com/uploads/1/3/4/0/134012847/kugolubiwiv-ladaxov-zokuvalu-vapoxetab.pdfIn PDF document text
    • http://aycotoro5.xyz/imagenes_de_tabata_jalil_en_revistawzm26.pdfIn PDF document text
    • https://pizeposinejuxow.weebly.com/uploads/1/3/2/6/132695365/b402739ef.pdfIn PDF document text
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/fowudivazewo.pdfIn PDF document text
    • https://zemedefikejo.weebly.com/uploads/1/3/4/0/134040876/vakisugapani-kegofaroja-palesijuzosokix.pdfIn PDF document text
    • https://togodinaxudare.weebly.com/uploads/1/3/1/6/131637070/ravenepubapujelakuna.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/fundamentals_of_machine_component_design_5th_edition_solutions_scribd.pdfIn PDF document text
    • http://1fps.ru/revifurezejar1ib.pdfIn PDF document text
    • http://card2card-perevod24.site/descargar_tubemate_gratis_para_androe187l.pdfIn PDF document text
    • https://luxufaxunixepu.weebly.com/uploads/1/3/4/5/134584211/5533854.pdfIn PDF document text
    • http://normab-id.com/mufg_debt_capital_markets_analyst_salary9kfem.pdfIn PDF document text
    • https://pigikitukapu.weebly.com/uploads/1/3/4/6/134693564/9667593.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://8546b567-499d-44cb-812b-f4cb210fa0cc.filesusr.com/ugd/1f0b74_c89c838480264ce99016e7cd14a421f4.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_67e99c5da4294c318d9e3902a5b5536d.pdf?index=trueIn PDF document text
    • https://a5a7f18c-b887-48a0-80cc-3627c14345d5.filesusr.com/ugd/609f59_fbd0e366f88b4e838b7e0838ac10e7fe.pdf?index=trueIn PDF document text
    • https://b064d0e4-88d6-4b7e-8087-8ebf790fcba6.filesusr.com/ugd/ca32a8_5ab520b908104848a2134a8e6712790f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5eb2e5e-87fd-4431-b9f0-6e0a2f5cb874/63261935075.pdfIn PDF document text
    • http://jagomizaf.atwebpages.com/16950148658.pdfIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_31768f59e7dc4fd2a0ee330e0480c082.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a7825c-f3f1-4762-9e9b-e289e6b5b590/15853366049.pdfIn PDF document text
    • http://sekuwomexapa.myartsonline.com/buku_musik_gitar.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00010876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10876 5748 bytes
SHA-256: 4e375b3e1c6c92b41d3ec1e573d3302d141b646e516b6288fd9df3735338a8f4
font_02_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 11092 bytes
SHA-256: bbb1631a713e82d9329508835b58faafce43eda6ce8eb13fa2c9b84437d51694
font_03_sfnt_off00014226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14226 16276 bytes
SHA-256: 339a92fb696ee81ef9ebb09a36a89a0552149f1e5217d7916235e62a5a8d340a
font_04_sfnt_off000157be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157BE 3488 bytes
SHA-256: 302483ff0df91442e1497b6ed8f97ea44362d9bb1f4f987570ca40eebbacdf39