Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a8d5d8b4b5ade0…

MALICIOUS

PDF

77.7 KB Created: 2021-02-14 15:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fe42c53c96a28d89f31c2095bf40dafd SHA-1: c72de49561b52c8e8cfdbbc81834a14643db6399 SHA-256: e1a8d5d8b4b5ade0851e264c5fe89b9ebe21cf4d1b1c142b9d02201f44877245
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, and includes the term 'millionaire club scam' in one of the URLs. This strongly suggests a phishing or scamming attempt. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/123?utm_term=millionaire+club+scam PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476767/normal_60125d351c6df.pdfIn PDF document text
    • https://vawuzusafut.weebly.com/uploads/1/3/4/8/134863851/ab44655f8.pdfIn PDF document text
    • http://hotita.fun/brimstone_haunt_directionsaf6gg.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/vudubotidomis.pdfIn PDF document text
    • https://lexizade.weebly.com/uploads/1/3/4/3/134368494/7645190.pdfIn PDF document text
    • https://gofupadosu.weebly.com/uploads/1/3/4/8/134853885/jozezedizonap.pdfIn PDF document text
    • https://gufonalika.weebly.com/uploads/1/3/4/0/134096228/xalupaje-jeseniviw-zokukufuz-ferutaduneto.pdfIn PDF document text
    • http://astropsychology.website/31097103484fmp1j.pdfIn PDF document text
    • https://raragunaxunu.weebly.com/uploads/1/3/4/8/134886293/6f315c1184015d2.pdfIn PDF document text
    • http://tefosewun.22web.org/itr_acknowledgement_slip.pdfIn PDF document text
    • http://bizuzoro.22web.org/architecture_house_plan_drawing.pdfIn PDF document text
    • https://garusase.weebly.com/uploads/1/3/4/6/134634063/lobegeguzufo.pdfIn PDF document text
    • https://wupupuredizuso.weebly.com/uploads/1/3/4/8/134894828/godoluzup-punevewowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://farilofisimoru.rf.gd/34738756886.pdfIn PDF document text
    • http://ketavulamuxi.epizy.com/criminal_law_2_notes.pdfIn PDF document text
    • http://pimizebogo.rf.gd/deptford_nj_police_reports.pdfIn PDF document text
    • http://xevorerokune.epizy.com/zolijazalomo.pdfIn PDF document text
    • http://mofagadelebedos.rf.gd/daa_file_extractor_free.pdfIn PDF document text
    • http://dafevuzadolax.epizy.com/muzix.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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5088 bytes
SHA-256: dad88403cfb838a9896085ae28d736d3731e440db4ea804ec835d6e0390f0653
font_01_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 11752 bytes
SHA-256: 33763818c8df1517951697a160395c0f5c667c0941c0f8a2acbb32815a3c1897

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