Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e32a9f3cf32c17…

MALICIOUS

PDF

78.1 KB Created: 2021-03-21 12:37:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: bfec42e785b1b60fb3b66d53d037f714 SHA-1: dd51329adf3f30ed084ff6aa2bd9a89acceddfaa SHA-256: f8e32a9f3cf32c179d8cb912a198c5d9f31c14b8f3e233382f89fe02b809c972
126 Risk Score

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 0.9992

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://xajibur.ru/strik?utm_term=what+are+time+management+strategies PDF link annotation
    • http://indonesia2health.online/92011613375wedgf.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/citizen_setting_instructions_e870.pdfIn PDF document text
    • http://valigulepi.scienceontheweb.net/how_to_connect_brookstone_wireless_speakers.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/wendys_menu_prices_philippines_2020.pdfIn PDF document text
    • http://gidepel.22web.org/56419672328.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/acet_exam_paper.pdfIn PDF document text
    • http://romomikas.22web.org/bittorrent_for_android.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/futuxak.pdfIn PDF document text
    • http://anyita.space/website_payment_terms_and_conditions_templatemood2.pdfIn PDF document text
    • http://avtoshkola-region26.ru/kelidl2jij.pdfIn PDF document text
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/576de569d.pdfIn PDF document text
    • http://strgb2.ru/dafegalimuwipiduvaknud.pdfIn PDF document text
    • http://masovizifuzaro.iblogger.org/jawiwinujolo.pdfIn PDF document text
    • https://fakokawiloduku.weebly.com/uploads/1/3/0/7/130775735/pitezijamafajoxebep.pdfIn PDF document text
    • http://teksalle.xyz/bunimuzebujapenamyyhbk.pdfIn PDF document text
    • https://tonaroxaz.weebly.com/uploads/1/3/5/3/135317799/a0accd7ac6a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavufupuvamopaf.atwebpages.com/pdf_to_word_converter_download_online.pdfIn PDF document text
    • http://boganarupimuga.epizy.com/zavotanedisitozuxarowi.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/wakodomumevizuzaxejopim.pdfIn PDF document text
    • http://domebiwek.myartsonline.com/tuninewowifufose.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/10116947415.pdfIn PDF document text
    • http://tediguku.atwebpages.com/kamelubuvudesidazivevekav.pdfIn PDF document text
    • http://fozijasorizol.epizy.com/el_diario_de_greg_libro_para_leer.pdfIn PDF document text
    • http://tapogexolewiji.epizy.com/81393176603.pdfIn PDF document text
    • http://rurebirafana.epizy.com/zidedakeliwavaxikutixuxax.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_off0000f721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF721 5080 bytes
SHA-256: baf809e5258e9d2df1bf2bb0729e304097e40fec8085638fc4ea3b8ccd6a7ada
font_01_sfnt_off0001084c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 10400 bytes
SHA-256: 43a57cabbc28cd6f2564690ff8c8587e1fc5ae6ba06ab955d82b132b55d5abce

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