Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc6c1c5c30af712e…

MALICIOUS

PDF

77.8 KB Created: 2021-03-26 07:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 594666005915c8cc2983835515d29b6f SHA-1: 828b658f9fb7a01084ef696ebe67d7c6ad5f508c SHA-256: dc6c1c5c30af712e0140b11f6bebb91a39ffaf22ca708349a4830c21935b5876
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://xezojetit.ru/strik?utm_term=synonyms+exercises+advanced+pdf PDF link annotation
    • http://vedefufedogoke.iblogger.org/45604932553.pdfIn PDF document text
    • http://viziziziv.mywebcommunity.org/lista_de_alimentos_altos_en_proteinas.pdfIn PDF document text
    • http://pink-echo.club/pufadurone6i4x.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/nascar_heat_mobile_apk_obb_downloadn7owi.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/L57iahe/17756809362.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/iaiiqge/virus_update_new_york_today.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/hcjjhbV/12934022970.pdfIn PDF document text
    • http://promoocaoameericanas.com/abecedario_chino_espaol4pruw.pdfIn PDF document text
    • http://fb-ig-copyright.com/theories_of_human_communication_downloadptx0o.pdfIn PDF document text
    • http://livemavuxedu.getenjoyment.net/48739011049.pdfIn PDF document text
    • https://cdn.sqhk.co/xuruwivagezu/ehgBPhi/21814282465.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/lopadivupudexa/93778947904.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_36a815a2f7b04026ad91d5ef20119169.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/macromolecules_in_your_food_info_sheet.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_99df49da465e4065abf8f711971de733.pdf?index=trueIn PDF document text
    • http://kafutifuvi.rf.gd/gukafegowofu.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/piano_sheet_music_for_simple_man.pdfIn PDF document text
    • https://47c0d0ed-94e3-447f-940a-e265262d053f.filesusr.com/ugd/a43ec6_b80627f334354373b174da53c186e729.pdf?index=trueIn PDF document text
    • https://233b4d2f-9c44-4004-b776-098ebc281e6f.filesusr.com/ugd/7f980c_8eb0999945304d289bdef47264c94811.pdf?index=trueIn PDF document text
    • http://rajafebinolug.epizy.com/built_in_water_dispenser_singapore.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37A 5600 bytes
SHA-256: 7b2d3e4b1b541ca43264eb016f88e3d006ff1a73530d744fa9a40d5cb88971d2
font_01_sfnt_off00010688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10688 10436 bytes
SHA-256: 5ef63749418524178cc981806a1f3eff9e787d9fdf04e389431fe31c2ad5b28c

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