Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf4d46f52186de5…

MALICIOUS

PDF

76.3 KB Created: 2021-06-12 05:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ba5a48da3e7961477737d8b32cf26113 SHA-1: 1842d7f9e127bb0c810c907337cea38d3ac4ba91 SHA-256: 6cf4d46f52186de5147b0bdc99012b42a32f620b9f7659dc57c5b750ce714e48
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 0.9995

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://drafthe.ru/pbw?utm_term=comportamento+alimentar+infantil+pdf PDF link annotation
    • https://taxurazuzar.weebly.com/uploads/1/3/4/0/134042721/gulekiwagimez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407756/normal_60b897f9b6b0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_605d7ebb623a8.pdfIn PDF document text
    • https://bekonerotukabi.weebly.com/uploads/1/3/4/3/134366377/7660394.pdfIn PDF document text
    • https://bemixujigimo.weebly.com/uploads/1/3/0/9/130969474/7292467.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491969/normal_5fdfaa695b037.pdfIn PDF document text
    • https://wemavepudobug.weebly.com/uploads/1/3/4/1/134108610/da7b89d21109ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492593/normal_601f86ce7fc1d.pdfIn PDF document text
    • https://potigaguw.weebly.com/uploads/1/3/0/9/130969810/5453608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd0057d1-2e50-45e7-ac50-d361e2c624f3/35388101693.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/f/100_mile_training_plan_advanced.pdfIn PDF document text
    • http://sawanixum.pbworks.com/w/file/fetch/144777627/51906863552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed08b566-afb0-4e03-996c-cb48eabc1178/sony_mdr_rf985rk_price_in_india.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/f/88483073423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d3c080-997a-4e71-8094-b75f5c2f92d8/huffy_mens_mountain_bike_reviews.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/145167357/full_english_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f31b0f0-d60d-4150-ac94-fe5110562cc1/30495179995.pdfIn PDF document text
    • http://kemususi.pbworks.com/f/como_hacer_manualidades_de_navidad_para_vender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c47e8b-1de4-4a38-9087-945cf64d2016/gunojafokaxilitanurokogob.pdfIn PDF document text
    • http://giwumekejam.pbworks.com/f/one_ui_2.1_apk.pdfIn PDF document text
    • http://fuxotatizexu.pbworks.com/w/file/fetch/144899364/70925108419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6b1c131-f932-4ac9-96e6-313c879bffb8/50895865282.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 4916 bytes
SHA-256: be1740e732ebcb2d6e29a789b5803c89f21283de3f442793ce2f0fa1b8486593
font_01_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 13512 bytes
SHA-256: d1ba18accfae8d200c632e07fbb4e138f9df8659791d303260c03de9bc640297

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