Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e335db0fc86cb58…

MALICIOUS

PDF

83.4 KB Created: 2021-03-23 05:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 97789765cc8f9c450a9ae8efbf6f7f83 SHA-1: 107b8e2703ba16922f3bd4757377f786a57de191 SHA-256: 3e335db0fc86cb58c17e0073dd00b174aaedb9e884b526e45753d80e7c7bf35d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/123?utm_term=dermatophytosis+treatment+guidelines PDF link annotation
    • http://nunegotopexipo.iblogger.org/27909093689.pdfIn PDF document text
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/dofotuvodujigubo.pdfIn PDF document text
    • http://nasufulorejuwe.mywebcommunity.org/respetar_los_derechos_humanos_en_ingls.pdfIn PDF document text
    • https://nidegezepon.weebly.com/uploads/1/3/4/6/134650885/d50c0247995f.pdfIn PDF document text
    • http://mudikovarew.mygamesonline.org/room_agreement_paper.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://gokonef.epizy.com/zulozoranapeteb.pdfIn PDF document text
    • http://bagemok.epizy.com/28281879540.pdfIn PDF document text
    • http://wumafopid.onlinewebshop.net/48936671391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dd3cc07-2d3e-4f00-a7a1-f899194d90a7/todas_las_parabolas_de_jesus_en_la_biblia.pdfIn PDF document text
    • http://meganisaniwo.rf.gd/lapesakojelujuzoxemexowis.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/information_overload_gif.pdfIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_7c3c3626a3984c5bbfd702823fbda630.pdf?index=trueIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_439219c5774f4949ae63d4d73655672e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b96d0551-f6e3-42b9-87e4-e772186520e3/moxezixikofijinolexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42239a85-6c72-48ef-b653-830110bb3cc0/dawagaxopefulepazepotaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf0e68f-88eb-42d5-84b6-78cd0c51259a/fluticasone_davis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad24ffae-993b-46ca-81c6-739a02d81677/what_is_sat_prep_course.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/subakeviderinemowigufo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2A 5356 bytes
SHA-256: e52cb716f1433c2420549be3f880dcbf275dc06f32aa1b61b5b096c785d1f3f1
font_01_sfnt_off00010c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C40 11248 bytes
SHA-256: 93cdb3808ffed8a89426e424e08caff39f6402fee664750bc34547ff24421cca
font_02_sfnt_off00013223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13223 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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