Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eab0c13115970c7…

MALICIOUS

PDF

91.1 KB Created: 2021-06-10 03:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e2be8f2ee10b2a8e69a1a6b72e3f8db3 SHA-1: 592d7d1148fdb117379180525242a7ed6ed89732 SHA-256: 8eab0c13115970c7c70b68b518c1ee2e0e7bcce3bed0e6a1b1a322a3652c9f1a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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, many hosted on compromised CMS upload directories 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 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=download+obb+pubg+korea PDF link annotation
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/mk3v0lemu1okinua9rbpcicr57/wumijupunixeroza.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094187d33d85---43038837074.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/vodidosef.pdfIn PDF document text
    • http://tano-cable.com/d/files/lotesaduvivar.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/xuwatebulumobivumoj.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071143297ecb---44641662256.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/78792893991.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cde8fdc496---setesizeguvov.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/9251178538.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/3df2906c9c9c4d726543b67c22e5faaf/duvewidadenujisob.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/91186065190.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/vapunevofovinovitasoda.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/676fe1d64474c6df031c7371717d2b3f/40324024475.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/b3129fb96808cb0458326f437b878761/60347152779.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a687b040e7ad1a51745cd488ebe517e0/dorozije.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/qfal14jsiiv57mafp05kqfuokq/ralumare.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
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF751 3760 bytes
SHA-256: a5a1381b705c52e642d6e9318e2b5cd7c8dd7033edee77367b451db77087aa36
font_01_sfnt_off000104fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FC 5000 bytes
SHA-256: 19b04e6ba60ddefb3a7c444bd7df6343c8affd40fcf69e51d6f4d8869683332a
font_02_sfnt_off00011614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 11176 bytes
SHA-256: fe8566da378f4111cef6a62fccb1d5a072ca8ccecf4d367c408e7920f779430c
font_03_sfnt_off00013c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C12 16092 bytes
SHA-256: 5f61313f1a3e3a671973c9d1dfad2a5a183df5c034e29bf06d98a49d76937e84
font_04_sfnt_off000150cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150CD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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