Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36babe98032720d…

MALICIOUS

PDF

74.5 KB Created: 2021-03-30 09:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0795dee0251006cbcdf2d782749baf7e SHA-1: 2d7e788859b16a04ab82157bf1086c07864aeb8b SHA-256: e36babe98032720d124ac329e0dd84969cfed5fad654fbcea6bc657b5c7dc481
134 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 0.9993

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 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://ponafet.ru/123?utm_term=small+pdf+converter+em+excel PDF link annotation
    • http://bionatur.space/nora_roberts_movies_on_youtube9s45x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393044/normal_5fee875ebc124.pdfIn PDF document text
    • http://fexabudobix.getenjoyment.net/500_hats_bartholomew_cubbins.pdfIn PDF document text
    • http://hytri.com/lesiritevewamemunamakixacqqj.pdfIn PDF document text
    • http://menformula.xyz/sunbeam_bakehouse_1kg_bread_maker_manualryz3k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_605449075598f.pdfIn PDF document text
    • http://lukunezevowazol.sportsontheweb.net/44497579087.pdfIn PDF document text
    • http://getyourscore.info/vodepumai658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420434/normal_5fe518b5379ed.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/lefujeni.pdfIn PDF document text
    • http://segaruzobuguses.scienceontheweb.net/92542411085.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/senala.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/guripawur.pdfIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_e64cd60934fe4d20bfacd976a7d6aac7.pdf?index=trueIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_34bc37fda8414003baef9c8abfa27afc.pdf?index=trueIn PDF document text
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_933a2ce863c64c6eb2ae1c5f36cd4a87.pdf?index=trueIn PDF document text
    • https://b860438a-ced3-4995-86f2-ad9a24e3f15c.filesusr.com/ugd/938eb2_33deefd896d24e33b55204a7f039a1ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/how_to_remotely_reboot_a_router.pdfIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_490de6bd59d4409bb349abe5fa5fea19.pdf?index=trueIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_9fd927e1883844e4b1f5333c82df36f0.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_36bc9f98bc014b2ebac4b140bddb6a24.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dukajevo/battlebots_game_pc.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/directive_atex_94_9_ce.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_off0000deb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB3 5356 bytes
SHA-256: 95c738eac26d9e8697f538ae12c207f6541cde04da5148fcc3f079e51825b159
font_01_sfnt_off0000f0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DE 13984 bytes
SHA-256: 1ef8fb39c3effc8e724b78bb690b2e9491aa2edbaf11994feb7b573a842e74f3