Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1c4ed16999cf1f…

MALICIOUS

PDF

80.0 KB Created: 2021-03-07 07:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ebc110d5ff385d52efb11caac2084744 SHA-1: d071da0e8c2951ebf0af209a1d7389b347567c01 SHA-256: 9c1c4ed16999cf1f9e83235c5a392cd66254a6039cf61bae7681faa21858bb8f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users. The embedded URL points to a domain associated with phishing and malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://crophysi.ru/aws?utm_term=1001+arabian+nights+pdf+tamil+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368506/normal_5ff3e2e5ee17c.pdfIn PDF document text
    • http://ultra0.space/60734502198w136j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_602e86fd3bc92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489733/normal_5fddaa65d6bd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416927/normal_6007c6578f2a7.pdfIn PDF document text
    • https://wamukefak.weebly.com/uploads/1/3/5/3/135324497/4eae5c1fc278.pdfIn PDF document text
    • http://shoop-fp.ru/692874040348inon.pdfIn PDF document text
    • http://tamakar.tech/sebejujikuzut5doe5.pdfIn PDF document text
    • https://vifabuwu.weebly.com/uploads/1/3/1/6/131606679/5974217.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_60093c6cd2585.pdfIn PDF document text
    • https://rudozusaviso.weebly.com/uploads/1/3/4/0/134041113/fotofeniwirijuri.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/b414d32e54c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_5fd993803aeab.pdfIn PDF document text
    • http://rezltml.xyz/67820128931gyqyw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_6018b11eab19b.pdfIn PDF document text
    • https://faremuxonebaw.weebly.com/uploads/1/3/4/5/134598019/bilozononizire_kawowa_sufijosex_bowifujokareju.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
    • https://uploads.strikinglycdn.com/files/a7fe5c5e-3c97-4784-a65d-9864e256b2f7/how_to_set_clock_on_oxo_triple_timer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02457cb8-d2c8-4358-969a-9a588d7e2221/29327833512.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/blanchard_macroeconomics_7th.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/antivirus_software_for_android_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fa02013-cff9-4571-b6b7-46f2ea72d278/shirley_jackson_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/69668542967.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49141528-1d54-4a9e-9019-536b0fc9b571/generac_4000exl_oil_change.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/mifukekafutatat.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/22977451747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e0cdc84-142a-497f-8483-90e46792ce42/nutribullet_rx_soup_recipes_broccoli.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_off0000edec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEC 5456 bytes
SHA-256: 747f7e150d7479e95cf591179893dc9668e7985fa1fa0cedce4b20f8daeee3e6
font_01_sfnt_off00010043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10043 10424 bytes
SHA-256: f7abd82fa659d30bbf5cddb790de91987c48536656a84013c85a5b9fd2d56d52
font_02_sfnt_off00012407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12407 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361