Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf5ffea4a6d81a2…

MALICIOUS

PDF

78.0 KB Created: 2021-03-25 03:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1fab140ecbfa68439fa18094f2627572 SHA-1: 8a6b4d609f2049d145fd95f8b53c4c25cefb58b8 SHA-256: acf5ffea4a6d81a27e37fe284baf834f3c36a73cf066a5b9d3d35660062f0d70
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 0.9996

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://dugedepap.ru/123?utm_term=mba+letter+of+recommendation+pdf PDF link annotation
    • http://iranomics.com/tipos_de_motores_electricos_de_corriente_continuae7o4e.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/20955445416.pdfIn PDF document text
    • http://sfr-webmail.com/its_not_my_cup_of_tea_origin1w6zj.pdfIn PDF document text
    • http://zifufarox.getenjoyment.net/texexixofekunazezawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467019/normal_6033e5ba9bcc5.pdfIn PDF document text
    • http://repochka.site/lebitapupawiberekona21f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480590/normal_60403bb9c695f.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/calentadores_solares.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/49381288078.pdfIn PDF document text
    • http://just-gopro.com/47003700782hrnrc.pdfIn PDF document text
    • http://trickyturkey.com/zlatan_bolanle_mp4_videoisydi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xilavivugup.epizy.com/all_tamil_comedy_video.pdfIn PDF document text
    • http://jipuzekas.rf.gd/vutivugolofivakeligux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1093e4a4-da27-4598-8d35-21c09f6d98d3/53626289450.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/cisco_outdoor_ap_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/zaxatufigatif.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/christmas_carols_sheet_music_for_piano.pdfIn PDF document text
    • http://xewepipesu.epizy.com/irrigation_solenoid_valve_manual.pdfIn PDF document text
    • http://nisogifamesada.epizy.com/java_8_concurrency_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4442bb43-5a53-4d68-9f4c-5d3ae3d53f78/sermon_outline_for_youth_revival.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce47276-7770-4a97-a569-328d60d89300/noxajuz.pdfIn PDF document text
    • http://pagitewuzowika.epizy.com/conjugates_and_dividing_complex_numbers_worksheet_answers.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_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 5268 bytes
SHA-256: c621f55e626cf07170b02e2dab3b268b9bfa0e047b04bc4a4474ff9dac80226d
font_01_sfnt_off0001074c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1074C 10436 bytes
SHA-256: e19cacfc9866640c2aa3717e484633674a565ef3ac38d1215ae03a5d78801a6e

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