Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3ed861f6deb33d…

MALICIOUS

PDF

86.0 KB Created: 2021-05-08 20:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9a3fec182b2589ae07714e63533dabf6 SHA-1: 56c3f258366606ff6870e0fb9f8788f5c8a1dd8b SHA-256: ae3ed861f6deb33db02c6a476e143a049aee0b2d61d5d53599f7a01458d3e4b3
186 Risk Score

Malware Insights

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

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 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://jacksth.ru/strik?utm_term=campos+principales+de+la+psicologia+organizacional PDF link annotation
    • http://just-gopro.com/devexasaxajolaon0p.pdfIn PDF document text
    • https://nazafusi.weebly.com/uploads/1/3/5/2/135297870/nagelimexinox_domon_debegojilalad.pdfIn PDF document text
    • https://cdn.sqhk.co/fitamorigob/egdggUq/hallmark_channel_app_samsung_tv.pdfIn PDF document text
    • http://gejurabek.getenjoyment.net/68787934011.pdfIn PDF document text
    • http://nufudoze.getenjoyment.net/47119077465.pdfIn PDF document text
    • https://xaxomawiso.weebly.com/uploads/1/3/5/3/135329970/dukubixesad.pdfIn PDF document text
    • https://fadasizoguwo.weebly.com/uploads/1/3/6/0/136050507/fiwovirigefezejapej.pdfIn PDF document text
    • http://bristol-yalta.run/sifelixidapozarijapagolu3o23e.pdfIn PDF document text
    • http://fulokixowo.scienceontheweb.net/96908615641.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/fubudexoro.pdfIn PDF document text
    • https://fikuzafunowu.weebly.com/uploads/1/3/1/8/131857523/a701eeef.pdfIn PDF document text
    • https://pebezudaxefen.weebly.com/uploads/1/3/4/3/134347708/liguromeputil.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/xigef.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/frheTDH/slow_rock_songs_free_download_mp3.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/15229073564.pdfIn PDF document text
    • https://nopumalazaf.weebly.com/uploads/1/3/0/8/130813483/jodudemug.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusonitid/db0qmYD/447053580.pdfIn PDF document text
    • http://drnextact.xyz/aquasource_bathroom_faucet_parts_diagramgyhyu.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/BUjgRhj/32367017997.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/makkar_ielts_general_reading_book_2020_free_download.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_off00010e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 5348 bytes
SHA-256: 1349012d1ddd9de066882b2fc6dac9724072001013ef64a787a248dbc8ae960d
font_01_sfnt_off0001209a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209A 12368 bytes
SHA-256: 07b49e2f607b8d76915e6fb3e15dc9842f46d58ba21d35b9cb54785c7fbe2dda

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